Does "exist" exist?
 

Is "is"?

yes, no

is equals equal

Sonic Youth answers everything

the yoof.

Existence precedes Essence. - Jean-Paul Sartre

It's not perfect, but it sure is a leg up over Rene Descartes' "I think, therefore, I am."

To sum up Sartre's Absurdist Existentialist position:
Facticity: We find ourselves existing in a world not of our own making & indifferent to our concerns. We are not the source of our existence, but find ourselves thrown into a world we don't control & didn't choose. All true philosophy & any real faith must begin with doubt.

Anxiety: We are faced with the lack of any external source of value & determination. We are faced with the responsibility of choosing our own nature & values, &, in doing so, we are faced with the awesome responsibility of ideally choosing values for all of humanity in our free choices.

Despair: In seeing the contrast between the world we're thrown into & which we cannot control & the possible potential absolute freedom we have to create ourselves, we must despair of any hope of external value or determination & restrict ourselves to what is under our own control. This goes back to Socrates' edict of self-knowledge as the first step to understanding anything.

"existence exists" --a. rand (sorry, couldn't resist)

"we must despair of any hope of external value or determination & restrict ourselves to what is under our own control."
I think that could be a summation of the principle of freedom.

form chaos came birth,from birth there was growth,when growth was achieved there was then gradual decay,the decay then ended in death.After death there were chaos ****