Steve: If you're 14 today you'll never legally be able to buy fags. Spot the hidden caveat in that sentence.
I'm guessing the 'caveat' you mean is that word 'legally'.

I'd rather spot the inaccuracy. If you're 14 now, but haven't yet had a birthday this year you were born before 1 Jan 2009, so can continue to buy cigarettes (once you're 18). The new law doesn't catch you.