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by vladsotirov 1305 days ago
The second Q needs no input because it is not executed: its source code is used as input for the first Q.
1 comments

> The second Q needs no input because it is not executed: its source code is used as input for the first Q.

But Q is the source code of a program that needs an input.

How would you determine if Q halts or not, if you don't give it an input?