@nikicaga I've now seen 'opportunity cost of kids growing' a few times here and it's the best argument yet. even candy crush on phone increases opportunity cost
@avidseries if you've actually been to those countries, you'll realise the best parts of spain (andalusia), italy (sicily) and greece (athens + islands) are in F.
@Devon_Eriksen_ why should it be z = 2 * x * y and not just z = 2 x^2.
part of being smart is to not be pedantic and just understand 'oh this is what they mean'