Doubts

His doubts about the existence of aliens were dispelled after he witnessed a UFO sighting.

John had doubts about the honesty of his friend.

He expressed his doubts about the effectiveness of the new company policy.

The chef doubts if the dish needs more seasoning.

The child doubts if there are monsters under the bed.

He doubts whether the car will start in the morning.

The teacher doubts if the students are paying attention.

He doubts his ability to complete the project on time.

The doctor doubts that the patient will recover fully.

She doubts that the restaurant will have vegetarian options.

He doubts the authenticity of the designer watch.