conjectural

the extinction of dinosaurs are still highly conjectural; the supposed reason for his absence ; suppositious reconstructions of dead languages; supposititious hypotheses.

The theory is purely conjectural at this point.

She made a conjectural guess about the ending of the book.

The scientist presented his conjectural findings to the research team.

The article is filled with conjectural statements.

Their decision was based on conjectural evidence.

The origins of the ancient civilization remain conjectural.

The artist's interpretation of the painting is purely conjectural.

The novel is full of conjectural twists and turns.

The professor's lecture was highly conjectural in nature.

The detective's theory was purely conjectural until more evidence was found.