mistakenly

to think that something is true when it is not

suponer erróneamente

to think that something is true, especially when you do not have enough information to be sure

creer incorrectamente que algo es verdad

to incorrectly recognize someone or something

to wrongly decide on the intended meaning of something

atribuir erróneamente

to incorrectly think that something is the result of a particular thing

pensar incorrectamente que algo es el resultado de una cosa en particular

to wrongly consider one thing to be the same as another

to drop bombs on the wrong target by accident