blind spot

he kept saying that one of his dogs was aggressive and would point to the passive one. i would say, 'no, that is the wrong dog' and he would say, 'oh,oh, really? okay, you're probably right. are you sure?' and then the aggressive dog's lips would curl into a snarl and i said, 'yes, see?'. anyway, it went back and forth many times and it was as if he had a blind spot when it came to this aggressive dog. i thought 'this guy should not own dogs.'