"I am pulling these out of my head because I have seen this before... And now I erase them."

"And now I pull a matrix out of the air."

"I'm still confused... I think this is what I want... No."

"You might have not seen this before, but recall anyway..."

"Let's take a completely random... Peterson graph."

"You don't have to check this. I did. It works. But who knows why..."