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J O H N   C H I A P P O N E

 

C H A P T E R  22

IMMANUEL KANT

The Limits of Reason

             

Immanuel Kant

(1724–1804)

Immanuel Kant
"Dare to Know"

Immanuel Kant was a German philosopher and polymath. His other interest were logic, theology, mathematics, physics, geography, anthropology, law, and history.
 

List of Polymaths


 

 


LIFE

Kant was born in Konigsberg - capital of East Prussia Germany.
His was a student and teacher at the University of
Konigsberg.
He never married.

It is said that his neighbors could set their clocks by him.
He never doubted the progress made by science.
 

 

 

 


VISION OF REALITY



 A Sunday Afternoon On The Island Of La Grande Jatte, by Georges Seurat
 

In a dream the mind constructs a reality of its own making. When we are awake, the external world (world-in-itself or noumenon) affects our senses. Our minds are presented with raw perceptions (phenomenon). It's a buzzing blooming confusion. From this chaos the mind constructs reality. Click the series of pictures below.

 

PHILOSOPHY

The Critique of Pure Reason (1781 revised in 1787)
Prolegomena to Any Future Metaphysics
(1783)

"I freely admit that the remembrance of David Hume was the very thing that many years ago first interrupted my dogmatic slumber and gave a completely different direction to my researches in the field of speculative philosophy."

How did David Hume awaken Kant from his dogmatic slumber?

Hume believed that there were two kinds of statements. Truths known by the relations of ideas, and truths that are known by experience. Truths that are known by the relations of ideas are necessary because they are true by definition (analytic statements). They are known independently of experience (a priori).

Truths known by experience are contingent - not necessary.

Hume saw this as a threat to philosophy because it isn't a science - or restricted to reason. He didn't see this as a threat to science; science just didn't provide necessary truths.

Kant saw deeper implications that threatened philosophy, science, and even mathematics.


TYPES OF STATEMENTS:

A Priori Statements:
A statement whose justification doesn't rely on experience.
Universal / Necessary Truth

Examples:
All bachelors are unmarried.
"I think; therefore I am."
7 + 5 = 12.

A Posteriori Statements:
A statement whose justification relies on experience.
Contingent Truth / Never Certain

Examples:
All bachelors are unhappy.
Some dogs are black.
Tables exist.

Analytic Statements:
The predicate (what is affirmed or denied) is in the subject.
You don't need to consult experience. They are true by definition.
There is no problem knowing these propositions.
They are all known a priori.
They don't add to our knowledge of the world.

Examples:
All bachelors are unmarried.
All triangles have three sides.
All tricycles have three wheels.
All bodies are extended.

Synthetic Statement:
A statement whose predicate is not in its subject.

Examples:
All bachelors are unhappy.
All creatures with hearts have kidneys.
All bodies are heavy.
The rose is red.


FOUR TYPES OF STATEMENTS: notes
 

Analytic A Priori Known by reason alone - by extracting the predicate from the subject. Uncontroversial, Universal, and Necessary
Example: Physical objects are extended.
Every effect has a cause.
Synthetic A Priori True by the mind's structure.
They are universal and necessary, yet not known by experience or logic; the predicate adds to the subject?
Example: 7 + 5 = 12
Every event has a cause. A straight line is the shortest distance between two points.
Analytic A Posteriori Self-Contradictory (They would need to be, and not be, based on experience.)
Uncontroversial

Example: A waste of time.

Synthetic A Posteriori Known by experience.
Example: Physical objects have weight.

Physical objects fall at 32' per second.



HOW ARE SYNTHETIC A PRIORI PROPOSITIONS POSSIBLE?

There are things-in-themselves; we can't know them. We only know appearances. Objects of experience conform to the mind; the mind doesn't conform to objects. How we experience things depends on our mental apparatus. Like in a dream the mind constructs reality. He wasn't concerned with our eyes, ears, nose, mouth, and skin. It is by the form of experience that the necessary connections exist that Hume couldn't fathom.

ILLUSIONS

The Yellow lines are the same length. Click on the name at bottom of pictue for an explanation.




File:Optical illusion greysquares.gif
Both the A and M squares have the same color. See below:


 

THE STRUCTURE OF THE MIND
What is required for any possible experience?

THE FORMS OF SENSIBILITY (sense perception)
How objects are presented to us.


SPACE AND TIME

Space and time are modes of experience; they don't exist outside of experience. These are structures of the mind. The mind uses these structures to organize our sense data. We can imagine empty space, but we can't imagine objects without space.
 

THE FORMS OF THE UNDERSTANDING
How we think about objects that are presented to us.
 

THE TABLE OF CATEGORIES

  Quantity   (Unity, Plurality, Totality)
  Quality  (Reality, Negation, Limitation)
  Relation (Substance, Causality, Community or reciprocity)
  Modality (Possibility-Impossibility, Existence-Nonexistence, Necessity-Contingency)
 


SUBSTANCE

Hume was right; there is no underlying perception for substance, it doesn't exist in the mind or outside the mind as Lock and Descartes thought. It is a logical category that the mind uses to unify objects. 
 

CAUSALITY

Hume was right; there is no underlying perception for a necessary connection between events. Causality doesn't exist in the mind or outside the mind. Again it's a logical category that the mind uses to understand experience. 
 



THE TABLE OF JUDGMENTS

Quantity
Universal
Particular
Singular
Quality
Affirmative
Negative
Infinite
Relation
Categorical
Hypothetical
Disjunctive
Modality
Problematical
Assertoric
Apodictic

 

 


 

Kant's Ethics

Groundwork of the Metaphysics of Morals (1785)


- Moral agents are rational animals. Morality is grounded in reason - not experience.

- Ethical standards are objective and universally binding.

- Kant's ethics are based on his categorical imperative. There are two versions of the Categorical Imperative:

    a. "Act only according to a maxim by which you can at the
        same time will it should become a universal law."
        (FMM 39 / 368)

    b. "Act so that you treat humanity, whether in your own
        person or in that of another, always as an end and never
        as a means only." (FMM 47 / 369)


-
Only a good will is good without qualification. 366

Your will is good when you:

   a. Act on a rule that you can will for everyone.


  
b. You act from duty alone. 367
      Deontological Ethics - deon means duty in Greek.
     
It must conform to, and be done for the sake of, the
      moral law. We're obligated to the categorical imperative
      because it's intrinsically right.
      Ignore the consequences.
      Acting for pleasure and consequences has no moral worth.

  c. Don't use people.
     
A rational being is an end in itself.
     Always treat people as an end - never as a means.
     Man is not an inanimate thing.

 



Determine Ethics

Collaborate:


Kant's ethical theory is called deontological. It ignores the consequences, and looks at the motive. Consequentialist ethics looks at the consequences, and ignores the motive. For them right acts produce pleasure and avoid pain.

Exercise 1:

Come up with examples where ignoring the consequences is absurd.

Come up with examples where ignoring the motive is absurd.


Exercise 2:

Look at the following examples and determine if they are deontological or consequentialist:

a. Terrance is engaged to Jessica - who is cheating on him. Terrance's best friend Phillip knows about Jessica, but when Terrance asked for his advice, Phillip lied. He doesn't tell his friend the truth because he doesn't want to ruin the wedding.

deontological or consequentialist


b. Although Phillip doesn't want to ruin the wedding, he tells Terrance the truth because lying is immoral.

deontological or consequentialist


c. Phillip tells Terrance the truth because Phillip is secretly in love  with Jessica, and he wants to get Terrance out of the way.

deontological or consequentialist


d.  Phillip lies to Terrance because Phillip is the one who is having an affair with Jessica.

deontological or consequentialist
 

e. While Jane and Rod are on vacation, their house is vandalized. Their son lies, and tells them everything is alright because he doesn't want to ruin their trip.

deontological or consequentialist


f. Your doctor knows your spouse is HIV positive. Should he tell you the truth?

Was your answer deontological or consequentialist?
 

g. Intel realizes that their new chipset has a problem. They decide to recall their product - at a coast of hundreds of millions of dollars. 

deontological or consequentialist

What do you think they should have done?

Was your answer deontological or consequentialist?


h. Every year thousands of people die waiting for an organ transplant. Should we pass a law that makes it legal for hospitals to harvest the organs of any healthy citizen who has passed away - regardless of their wishes?

Was your answer deontological or consequentialist?

i. Dr. Jack Kevorkian argued that we should harvest the organs of death row inmates who have been executed. What do you think? Should we:

I. Give them a choice, and harvest their organs if they approve.

II. Don't give them a choice, and harvest their organs.

III. Don't give them a choice, and don't harvest their organs.

Was your answer deontological or consequentialist?


j. When our pets are suffering, and death is inevitable, we put them to sleep. Should we give people the same choice?

Was your answer deontological or consequentialist?


k. Should we clone people with their consent?

Was your answer deontological or consequentialist?


l. Should we genetically engineer people?

Was your answer deontological or consequentialist?


 


 

    My Means  <  Your Means is a Beautiful Act
    My Means  =  Your Means is a Moral Act
    My Means  >  Your Means is an Ugly Act

 

PROBLEM

John Stuart Mill argued that Kant is considering the consequences, but Kant is referring to the inconsistency and contradiction of irrational rules only. 369

 



  
Happiness is the satisfaction of the sum total of your desires.
 

 

... in this idea of happiness all inclinations are combined into a sum total. ... yet men cannot form under the name of 'happiness' any determinate and assured conception of the satisfaction of all inclinations as a sum, (p1066, sec399)

 


  Intuition (not reason) is the best faculty for happiness
  (p1063, 1078).

 

 

... if ... happiness, were the end of nature ..., then nature would have hit upon a very poor arrangement in having ... reason ... carry out this purpose. ... [Happiness] could have been attained much more certainly by instinct ... .  The more a cultivated reason devotes itself to ... happiness, the further does man get away from true contentment. Because of this there arises in many persons ... a certain degree of misology, i.e., hatred of reason. This is especially so in the case of those who are most experienced in the use of reason ... they ... find that they have only brought more trouble on their heads ... they come to envy, rather than despise, the more common run of men who are closer to the guidance of ... instinct and who do not allow their reason much influence on their conduct (p1063, sec 395).

 


  
"Instinct never suffers the confusion of reason," said Joe Weider.

    Is the examined life worth living?

 


ONLINE BOOKS

He published his chief philosophical work A Treatise Concerning the Principles of Human Knowledge in 1710. After its poor reception, Berkeley rewrote it in the dialogue form, and he published it under the title Three Dialogues between Hylas and Philonous in 1713.
 

The Critique of Pure Reason (1781, revised 1787)

Fundamental Principles of the Metaphysic of Morals

Sparknotes

Canonical Reading List in Philosophy

 

 

VIDEOS:

Bryan Magee & Sir Geoffrey Warnock on Kant

Section 1 | Section 2 | Section 3 | Section 4 | Section 5

 

 
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