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?