Logic && Linguistics
A programmer's poem: "Who is this?"

What is; this?
This, is whatever you have set in motion.
Why is it; this?
Because you have set it into motion.
Where is; this?
Wherever you have put it.
When is; this?
This; is the moment you have saw fit to look.
Who is; this?
It is far more relevant to ask, "who am I?" (when asking about this.).

AJW2016

*programming is one of the only places you will see the present singular possessive form of the word 'this' as this' pron. this-ez