Logical connective

ERGO

Think of the Latin word that means "therefore" in philosophical arguments.

"Logical connective" hints at a word that links ideas in reasoning, and "ergo" fits perfectly as a Latin term meaning "therefore." It’s often used in formal arguments to show a conclusion follows from premises, like "I think, ergo I am." The clue plays it straight—no wordplay or tricks—just a direct reference to a classic logical transition.