“-When I speak you hear me, L.?
Yes, I hear you.
-But maybe not in the instant of the present?
No. I hear you with a delay of 0,0001 seconds.
-So we can say it isn’t the present?
No, it isn’t. There are two presents. Yours and mine.
Separated by an interval; the time it takes light… the voice…
340m per second to get to my ear.
That’s why I don’t know who you are since I can not be in your present.
And in consequence, as I don’t know who you are, I can’t know who I am.”

Φ