Asking Tim would require Foster to believe that Tim were not acting under the illusion of false beliefs.

Which he has already demonstrated to be the case.

So, no. He won't ask what Tim thinks. Tim thinks they're equals of some sort. Thinks that what he wants matters as much or more than why he wants it. Foster is having none of it.

"I know time is finite," he replies blandly. He isn't even speaking specifically of Tim--time as a concept is finite, to be lost in the end with all life and all Creation, subject to final oblivion by the nature of the Void.

He finds another smile in an infinite well of them--a smile of challenge and anticipation, his blue eyes bright behind their half-mast lids.

"If you're committed to wasting it, then prove it."