Primer Quote
Aaron: [voiceover on the phone continued from the beginning; intercut with some live-action dialogue] The permutations were endless. They tried again going to the source, but even while keeping them separated from Abe by two rooms, Thomas Granger's condition could only be described as vegetative. From this, they deduced that the problem was recursive; but, beyond that, found themselves admitting, against their own nature, and once again, that the answer was unknowable. The question should have been what to do with the comatose man in the guest bedroom, but in Abe's mind, he was already compiling the list.
Movie: Primer