The idiotic idea goes like this:

0 = Ø
1 = { 0 } = {Ø}
2 = { 0, 1 } = { Ø, {Ø} }
3 = { 0, 1, 2 } = { Ø, {Ø} , {Ø, {Ø}} }

Now pay attention morons!

0 + 1 = 0 \/ 1 = Ø \/ {Ø} = { Ø, {Ø} } = 2

Chuckle. That, dear students is the crapola you pay thousands of dollars to learn from morons who don't even have a clue what "number" means.

Sue the universities you attend for FRAUD. Get those herpetic old queers out of academia.

Don't waste your time learning bullshit which you can't use anywhere except in Lala land.

Think morons, think!