Which noun means an opinion formed on little or no evidence; a guess?

• A. Conjecture
• B. Cursory
• C. Didactic
• D. Ephemeral

Answer: (A)

Conjecture is a noun that means an opinion formed on little or no evidence; essentially a guess. It captures the sense of something proposed without solid proof, often used to describe a tentative conclusion or hypothesis. For example, you might say, “Her conjecture about the cause of the delay was based on what she observed, not on solid data.”

The other options don’t fit the noun meaning of a guess. Cursory describes something done quickly and superficially and is an adjective, not a noun. Didactic means intended to teach, also an adjective. Ephemeral means lasting for a very short time, again an adjective.