Group 1 - max(a) is 3 ---- nothing in b is greater than a

Group 2 - max(a) is 2 ---- 3 (in b which is the whole table) is greater than 2 so this is true

Group 3 - max(a) is 3 ---- nothing in b is greater than a

Group 4 - max(a) is 3 ---- nothing in b is greater than a

Group 5 - max(a) is 1 ---- 2 & 3 (in b which is the whole table) are greater than 1 so this is true

Group 6 - max(a) is 2 ---- 3 (in b which is the whole table) is greater than 2 so this is true

Group 7 - max(a) is 3 ---- nothing in b is greater than a

Okay, I've got it now. I think I was getting my a and b contexts confused. Thanks for the help folks. It probably helped that I increased my blood caffeine level.

GREAT question. The amount of smoke coming out of my ears has doubled.