Shop assistants know absolutely nothing about prod...

Shop assistants know absolutely nothing about product that they are selling.
If you ask for any kind of information they don't know.
Ask them what TV is better and they will only advice you accordingly the price.

I've ask what kind of parameters do these two TVs have different and they've said yes they have some different.
Ok so what parameters?
I don't know. This one is more expensive so "must" be better.
They don't know anything.