"But you really don't get this and you are making a fool of yourself. You both need to clarify the difference between antimicrobials (hot water, soap, hand gels, Dettol, Harpic, chlorine, Savlon, etc) and the far narrower category, antibiotics."

Strange. my definitions have antibiotics included in antimicrobials.
Who is right and who is wrong I wonder?

My definitions come from a teaching resource regarding Antimicrobial Resistance in Veterinary Medicine with contributors including Michigan State University, the University of Minnesota and the Centers for Disease Control and Prevention.

I think I have a little more confidence in the above than the incorrect output of a conceited exteacher that thinks he is a well educated scientist.