Wrong
Actually, he’s right. Assault rifles are have the capability of select fire, you can switch from single shot per trigger pull to a burst or full auto, an intermediate size cartridge and a detachable magazine.
There is no such thing as a semiautomatic (one shot cycle per trigger pull) assault rifle. There may be rifles that look like them, but they are not.
Actually he is spot on and You are the one who is wrong.