evidence: Explanation [edit]Lewis Carroll was showing that there is a regressive problem that arises from modus ponens deductions. [...] Sources [edit]Lewis Carroll (April 1895). "What the Tortoise Said to Achilles". Mind. IV (14): 278–280. doi:10.1093/mind/IV.14.278. [...] References [edit]- ^ a b c d e f g h i j k l Carroll, Lewis (1895). "What the Tortoise Said to Achilles". math.dartmouth.edu. Retrieved 25 March 2024.