The question resolves "No" if, at the time Thomas Pynchon's death is widely reported — e.g. in the New York Times or the New Yorker — there is no newer novel than Bleeding Edge (2013) listing him as the sole human author. The question also resolves "No" if a novel (speculated or known to have been written by Thomas Pynchon) is published pseudonymously.

Otherwise the question resolves "Yes," even if the novel is widely reported to have been co-authored with an AI.