That,That is,is,That,That is not,is not

Can anybody help me I've been trying to find the ending for this phrase for a while. I first saw the phrase in a movie just like the "Lawn Mower Man" but much older when a simple man is turned into a genius.

Just in case you didn't read the subject line
the beginning of the phrase is.
That,That is,is,That,That is not,is not

The conundrum asks how to punctuate the following so that it makes sense. that that is is that that is not is not is not that so. Answer.

That that is, is. That that is not, is not. Is not that so?

Reminds me of another conundrum that was going around at the same time (50 years ago in the UK) The question was "Write a sentence that includes the word AND six consecutive times." Anyone?

I am looking for Vic Harding, who coached at
LA Harbor College in 1989. Any possibility?