@WBYeats,
WBYeats wrote:
When asked whether murder could have been done before a certain time, a person replies:
-'That's out of the question,' I said.
The writer uses THAT IS not THAT WAS; is it because IS is more easy to slip off the tongue?
That is (now, in the present, which, for the speakers, is when the conversation takes place) out of the question.