He said, "You use semicomma!"

You must use a semicomma in that situation.

This is a sentence with a semicomma:
He used a semicomma; therefore, he did not know that the semicomma was indeed called a semicolon.

phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz

In the sentence 'We are human beings', a semi-comma occurs three times. Symbolically, it can be written as 'We*are*human*beings.', where '* (asterisk)' would represent 'semi-comma'.