Complex sentence: Without an inference rule (like "modus ponens" in this case), there is no deduction or inference; this point in also illustrated in Lewis Carroll's dialogue called "What the Tortoise Said to Achilles".
Split into simpler sentences: Without an inference rule (like "modus ponens" in this case), there is no deduction or inference. This point is illustrated in Lewis Carroll's dialogue called "What the Tortoise Said to Achilles".