- Berkeley’s idea that the condition for something to exist is that it be perceived by some mind (at least God’s).
* Also, his argument for thinking this is true.
- To exist is to be perceivable (of what is already perceived by God)
Premise 1: All we perceive are ideas.
- Everything we know comes from sensory experiences, which are ideas in our minds.
Premise 2: There is no evidence for the existence of material substance.
- We do not have direct access to any material substance behind our ideas. The concept of material objects existing independently of perception is speculative and unnecessary.
Conclusion 1: To exist is to be perceived.
- If all we perceive are ideas, and we have no need for the assumption of matter, then existence itself consists in being perceived by a mind.
Premise 3: Ideas cannot exist without being in a mind.
- Ideas are mental entities, so they cannot exist independently of a mind that perceives them.
Conclusion 2: The continuity of objects is maintained by God’s perception.
- Even when no human is perceiving an object, it continues to exist because God is always perceiving it.
- Berkeley’s claim that all that exists are minds and ideas.
Minds (or spirits): These are active, perceiving entities—subjects that have ideas. Minds are the things that do the perceiving.
- Where ideas reside
- The soul/me
- Something which perceives ideas
Ideas: These are passive, perceived entities—objects of perception, like sensations, feelings, and thoughts. Ideas exist in the mind but have no existence outside of being perceived by a mind.
Thus, physical objects are really just bundles of ideas. For example:
- The objects of knowledge
- Sensory qualities
A table is not some material object that exists independently of us. Instead, it is a collection of ideas (shape, texture, color, solidity, etc.) that we perceive.
These ideas exist in our minds when we perceive the table, and their existence depends on being perceived by someone.
Berkeley’s argument for thinking that when I say ‘elephant’, I am always referring to my ideas.
when you imagine an elephant, you might picture a large, gray animal with a trunk and tusks. All of these properties—its size, color, and form—are ideas that exist in your mind.
Berkeley argues that it makes no sense to speak of an elephant that exists independently of these perceptions. The elephant is nothing more than the collection of ideas that you and others have about it. So, when you say “elephant,” you are always referring to your ideas of the elephant
All of ‘houses’, ‘elephants’ and ‘apples’ are things we call the combination of ideas
○ SO, these things do NOT exist independently of us
After all, ideas only exist in our minds
- Berkeley’s argument for thinking that since I always refer to my ideas, then there are no material objects in the world.
P1: All that we perceive directly are ideas (collections of qualities like color, shape, sound, etc.).
P2: When we use language to describe objects (e.g., “elephant”), we are referring to these ideas, not to anything external.
P3: We have no experience or evidence of material objects existing independently of our perception.
P4: Ideas do not need to be grounded in material substance; they can exist in the mind without it.
P5: The coherence and continuity of the world of ideas is maintained by God’s constant perception.
Conclusion: Therefore, there are no material objects; only minds and ideas exist.
- Berkeley’s argument for concluding that we cannot conceive of things as unconceived.
- If X conceives of T as unconceived, then X conceives T
- If X conceives of T, then T is an idea
- If T is an idea, it exists only if perceived
- If T exists only if perceived, it cannot exist unconceived
- It is impossible to conceive of T as unconceived
- Berkeley’s argument for thinking we cannot decide what we see.
* This requires that you know what Berkeley means with vivid and clear ideas, and less vivid and clear ideas (where do they come from?).
all our ideas—sensations, things we perceive, are visibly inactive; there is no power or agency in them
Test - what are vivid and clear and less vivid and clear
Basic argument - George Berkeley
- Perceptual experience gives us ideas
- The things we know, we learned from perceptual experience
- Everything you know is just made up of ideas (from 1 and 2)
- Ideas exist only in the mind, everything you know exists only in your mind
a. To be is to be perceived
—- Nothing exists outside the mind
what does Berkeley mean with vivid and clear ideas (where do they come from?).
Vivid & clear ideas: are such because they are given to us involuntarily and with great force (sound of a bird) We do not choose these ideas; they are “impressed” upon us from our sensory experiences, which in turn come from the perceiving mind of God.
Ideas of sense (vivid and clear) come from God, who directly causes us to perceive the sensory world.
- There is no need for material objects to explain sensory perception, as God implants these ideas directly in our mind
- Alternatively…
Ideas of imagination and memory (less vivid and clear) come from our own minds. They are based on past sensory experiences and are reconstructed or recalled voluntarily by us, though they lack the vividness and immediacy of ideas of sense.
What does Berkeley mean with less vivid and clear ideas (where do they come from?).
ideas that come from imagination or memory. They are less vivid, weaker, and not as clear as ideas of sense. For instance, when we imagine a tree or recall a past event, the idea is much fainter and less detailed
Generated by our own minds - They originate from our imagination or our memory and are not directly caused by sensory experiences in the present moment.
These ideas are voluntary—we can summon or manipulate them (e.g., imagining a tree that doesn’t exist or remembering a past experience). ALWAYS based on previous sensory experiences,
as Berkeley argues we cannot imagine something entirely new that we have never sensed before.
