Full Idea
If I say of myself that it is only from my own case that I know what the word 'pain' means - must I not say the same of other people too? And how can I generalise from the one case so irresponsibly?
Gist of Idea
It is irresponsible to generalise from my own case of pain to other people's
Source
Ludwig Wittgenstein (Philosophical Investigations [1952], §293)
Book Reference
Wittgenstein,Ludwig: 'Philosophical Investigations', ed/tr. Anscombe,E. [Blackwell 1972], p.100
A Reaction
This is the best known objection to Mill's Argument from Analogy for other minds. It appears to be induction from a single instance. The better approach seems to be ABduction (best explanation), in which my own case is just some evidence.