Hume & Kant Notes

Hume's Copy Principle

  • All ideas are copies of impressions.
    • Example: Seeing a red apple leads to the idea that all apples are red.

Analytic and Synthetic Judgments

  • Analytic Judgment (A = P): The predicate (P) is contained within the subject (A). This is a statement of fact.
  • Synthetic Judgment: The predicate adds something new to the subject. For example, "the cat is on the mat."

Relations of Ideas vs. Matters of Fact

  • Relations of Ideas: Known through reason (e.g., 2 + 2 = 4).
  • Matters of Fact: Known through experience (e.g., "the sun will rise tomorrow").

Principle of Uniformity of Nature

  • The assumption that the future will resemble the past.

Induction vs. Demonstrative Reasoning

  • Induction: Drawing general conclusions from specific observations based on experiences.
  • Demonstrative: Based on definitions, facts, and logical mathematics.

Concepts and Intuitions

  • Concepts: General rules used to understand what you see. The concept of a tree helps you recognize different trees.
  • Intuitions: Direct sensory perceptions (e.g., directly seeing a tree).

Mathematical Knowledge

  • Hume: Based on relations of ideas, true by definition.
  • Kant: A priori, depends on pure intuitions of space and time.

Metaphysical Knowledge

  • Hume: We cannot know beyond what we experience (e.g., God, soul, causation).

Judgment of Perception vs. Judgment of Experience

  • Judgment of Perception: Personal, based on how you see things (e.g., "the sun warms the stone").
  • Judgment of Experience: Transforms perception into knowledge (e.g., "the sun causes the stone to become warm").

Space and Time

  • Space: We perceive objects as being outside of us.
  • Time: We perceive events happening in a sequence.

Argument Against Personal Identity

  • There is no permanent "self," only a collection of different perceptions.

Transcendental Idealism and Empirical Realism

  • Transcendental Idealism: Reality is mind-structured; we only experience appearances.
  • Empirical Realism: We know things are real within our experience.

Moderate Skepticism

  • Based on experience, which can be false. You expect the sun will rise tomorrow, but you cannot definitively prove it.

Possibility of Metaphysics as a Science

  • Conditions that make experience possible, not things beyond experience.

Antinomies of Pure Reason

  • Show the limits of pure reason; it can argue both for and against a position.

Imagination vs. Understanding

  • Imagination: Combines visual stimuli into a single motion.
  • Understanding: Applies the concept of cause, making sense of it.