# Endnotes explained — The Problems of Philosophy

> Chapter companion for The Problems of Philosophy by Bertrand Russell.

## What happens

This chapter contains endnotes referencing A. N. Whitehead's Introduction to Mathematics and clarifying Kant's concept of the 'thing in itself' as the cause of sensations, noting that Kant held categories inapplicable to it.

## Themes in this chapter

### Appearance vs. Reality

Kant's distinction between the 'thing in itself' (reality) and its appearance through sensations is discussed.

## Character check-ins

### Immanuel Kant

Referenced in the endnote regarding the 'thing in itself' and its relation to sensations and categories.

## Key lines

> Kant’s “thing in itself” is identical in “definition” with the physical object, namely, it is the cause of sensations.

Kant's 'thing in itself' is defined the same as a physical object: it is what causes our sensations.

_Clarifies the definitional equivalence between the noumenon and physical object._

## Links

- HTML: https://www.betterreads.online/discover/the_problems_of_philosophy_se/chapters/endnotes
- Book: https://www.betterreads.online/discover/the_problems_of_philosophy_se
- All chapters: https://www.betterreads.online/discover/the_problems_of_philosophy_se/chapters