CONJECTURE

[verb], [noun] - (to form) a guess or judgment, based on the appearance of a situation rather than on proofWe'll never know exactly how she died. We can only conjecture. [I]He conjectured that the company would soon be in financial difficulties. [+ that clause]There's been a lot of conjecture in the papers recently about the royal marriage. [U]It's pure conjecture. Nobody knows the facts. [U]