The quality or state of being capable of being deceived or tricked.
From deceptible (able to be deceived) + -ity (noun suffix indicating a state or quality). The root comes from Latin decipere, 'to deceive,' with -ible meaning 'capable of being.'
Philosophers and magicians study 'deceptibility'—our brains are vulnerable to illusions and false information in predictable ways, which is why magic tricks and propaganda work on almost everyone.
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