educated guess or speculation

conjecture

noun|/kənˈdʒɛk.tʃər/

An opinion or conclusion based on incomplete information

Examples

In a meeting

At this point, we're operating on conjecture rather than solid data.

Over coffee

It's all conjecture until we hear the official announcement.

Why this word

guess

Conjecture implies reasoning from incomplete information, while guess suggests less analytical basis

speculation

Conjecture emphasizes forming a theory without firm evidence, while speculation is broader and can include theoretical reasoning

assumption

Conjecture acknowledges uncertainty in the inference, while assumption treats something as given or accepted

Usage tip

Use when emphasizing that conclusions lack complete evidence or proof

Etymology

Latin 'coniectura' (con- together + iacere to throw)

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