You can use
a computer, and program a computer,
without understanding how it actually works.
That is okay for beginners
, but understanding
how things work is what makes us truly human,
As humans, we have a natural curiosity
an inner drive to understand
So it's a pity that by way of "education"
(parents and other adults, school, media)
most of us learn
to accept "It's complicated."
as a sufficient answer to silence our instinct.
So forget that the computer is complicated.
I try to explain it in this bonus
in a very concise
and didactic way.
(Should you still
not understand it afterwards:
Blame me, not yourself or the computer!
And find a better source for you.)