Don't be fooled by his pleasant manner - he's pretty ruthless beneath that nice exterior.
I'm not easily fooled.
You can't fool me!
He fooled a lot of people.
He was determined, however, not to be fooled by any further false promises.
Can an observer maintain a hold on certainty at the same time that he announces his desire to be fooled?
Don't be fooled, those ways can persist into old age.
