People who think they are intelligent?

I hate people who make themselves intelligent!!! Does this sentence mean anything?
Well it doesn't as it is written, but if you translate it to arabic, you will understand what I mean.

People can either be intelligent or not! They cannot look intelligent if they are not, no matter what they try. So what do you think happens when people try to make themselves intelligent, especially when they are neither intelligent nor the least logical???

Whatever the subject, they begin giving you stupid arguments that even my kid of 4 years would frown at for their lack of congruence. And then they give you a pitiful smile (the worst experience is when they have some black teeth).

So what should we do when we have in front of us such a specimen? Should we move away? Should we try to make them intelligent by talking to them? My choice is usually to let go, but it's not always easy!