conjectural

adjective
🔊/kənˈdʒektʃərəl/
🔊/kənˈdʒektʃərəl/
(formal)
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  1. (of an opinion or idea) not based on definite knowledge; formed by guessing猜测;推测
    • Some of the stages of the earth’s development are purely conjectural.地球发展的某些阶段纯粹是推测性的。
    Topics Doubt, guessing and certaintyc2