Credulity implies someone can be easily tricked due to their readiness to believe. His credulity left him vulnerable to online scams.
Pro Tip 2/3
Not Always Negative
While often carrying a negative connotation, in some contexts credulity can suggest an open, trusting nature. The child's credulity gave life to the fantastical stories.
Pro Tip 3/3
Literary Device
In literature, a character's credulity may be used to introduce plot twists or illustrate a moral lesson. The protagonist's credulity led him into the villain's trap.