"I forget" <--- isn't this incorrect?

[nq:1]I constantly hear people saying "I forget" instead of "I forgot" and they claim that "I forget" is present tense and therefore correct but I have never ever heard the term "I forget" being used by an English teacher.[/nq]
"I forget" is used quite often by native speakers with the meaning "I can't remember now". "I forgot" means that that at some time in the past "I didn't remember", but

[nq:1]I constantly hear people saying "I forget" instead of "I forgot" and they claim that "I forget" is present tense and therefore correct but I have never ever heard the term "I forget" being used by an English teacher.[/nq]
"I forget" is an idiom that is in common use. It means something different from "I forgot".
"Did you do that?"
1. "I forgot." I forgot to do it.
2. "I forge

[nq:1]"Did you do that?" 1. "I forgot." I forgot to do it. 2. "I forget." I can't remember whether I did it or not.[/nq]
Then:
"I forget" ==> "I can't remember"?
Bye, FB

Mrs. Palmer, in her way, was equally angry. 'She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all'.

[nq:2]"Did you do that?" 1. "I forgot." I forgot to do it. 2. "I forget." I can't remember whether I did it or not.[/nq]
[nq:1]Then: "I forget" ==> "I can't remember"?[/nq]
Yes.

John Hall
"The covers of this book are too far apart."
Ambrose Bierce (1842-1914)