Choose the correct antonym of ‘CONJECTURE’

The correct antonym for 'CONJECTURE' is 'Fact'.

Conjecture refers to a conclusion or opinion formed on the basis of incomplete information, essentially a guess or speculation. The opposite of this - a statement or assertion known to be true based on evidence or reality - is a fact. Therefore, 'Fact' is the antonym of conjecture, as it represents something certain and based on truth, as opposed to a conjecture, which is speculative and uncertain.

The other options provided don't accurately represent the antonym of conjecture:

• 'Speculation' is a synonym of conjecture, not an antonym.

• 'Unreal' refers to something not real or imaginary, which doesn't directly contrast with the idea of a guess or hypothesis.

• 'Flat' is not relevant in this context as it generally refers to a level and smooth surface or a statement made emphatically, and does not directly oppose the concept of conjecture.