MahāvaggavaggaSabbamatthītikathā

Abhidhammapiṭaka · Kathāvatthu · Vol. 37 · Section 346

[346] S. Having been present, does it become past? P. Yes. S. Is the present the very same thing as the past? P. It should not be said thus. … S. Is the present the very same thing as the past? P. Yes. S. Having been, does it exist; having been, does it exist? P. It should not be said thus. … S. Having been, does it exist; having been, does it exist? P. Yes. S. Not having been, does it not exist; not having been, does it not exist? P. It should not be said thus. …

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.