Rebel1 watches a bit of TV most days, and goes on the computer several days a week, but his consumption is nowhere near that!
The figures don't add up really do they?
He may watch a bit in the morning whilst he's eating his breakfast (he's first up, and enjoys time on his own, lol). Say 30 minutes (which is far more than he ever does).
He gets home from school just after 4. Even if he starts watching/using straight away, and doesn't stop for anything, it still means it's 11 pm before it gets turned off.
Take out of that getting changed, non-computer homework, tea (he often gets his own), the odd job, trampolining, bikeriding, after-school club, karate, swimming, scouting, etc etc etc.
Physically impossible.