Gullibility

Sami is not very good at hiding his gullibility.

Yanni's gullibility sealed his fate.

It's reprehensible to exploit a person's gullibility.

Con artists take advantage of the gullibility of inexperienced creditors and defraud them of their money.

What distinguishes the core of the rightwing populist electorate is its gullibility to idiocy-promoting rhetoric against climate science.