/diy/ - Do It Yourself

>studying electricity at trade school
>tool workshop class, second day, first time in actual workshop.
>teacher talk about hand saws like pic related
> he says
'' all handsaw either cut on the push stroke or on the pull stroke. None cut on both''
>raise my hand and tell him its not true in a respectful manner.
>another student agree
>boomer teacher call us dumb and to ''google it'' if we are that smart and we'll see we are wrong.

im just home, should i write an essay showing him how many handsaws if not most commonly used saws are double action ? or is that too autistic and boomer might hate me for teaching him ?