Full Idea
To punish Socrates waking for what sleeping Socrates thought, and waking Socrates was never conscious of, would be no more right, than to punish one twin for what his brother-twin did.
Gist of Idea
Should we punish people who commit crimes in their sleep?
Source
John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 2.27.19)
Book Reference
Locke,John: 'Essay Concerning Human Understanding', ed/tr. Nidditch,P.H. [OUP 1979], p.342
A Reaction
Personally I would feel guilty if I had a dream in which I had behaved immorally, though I wouldn't expect to be punished. It would be shocking to deny all responsibility if you had murdered someone while you were sleep-walking.