The professor made a conjectural statement about the outcome of the experiment.

The existence of aliens is purely conjectural.

She is conjecturing about the outcome of the experiment.

Conjecturing is an essential part of the scientific process.

The Poincaré conjecture was a famous unsolved problem in mathematics for over a century.

He spoke conjecturally about the outcome of the election.

The cause of the accident is still conjecturable.

The conjectory explanation of the phenomenon is still being debated among scientists.

He spoke conjecturably about the outcome of the game.

The conjecturer made several guesses about the outcome of the experiment.