What are the idioms that describe "doubt"?

Idioms describing "doubt" are:

With doubts, full of doubts, doubts, doubts caused by doubts, is it true?

Interpretation of the above idioms:

Solve doubts with doubts: use doubtful knowledge to judge unpredictable things.

City by the sea: city by the sea in my heart.

Doubt yír zh Jiàn: It means to be indecisive.

Cast a vote to confuse tóu zhüzhüHuò: It is a metaphor that repeated rumors have shaken the original beliefs and generated doubts.

Why not? Is that so? Express doubt.