Mental errors are preventable. That's an admission that basically says "I won't tolerate guys being dumb."
TB12 added "We have a pretty smart group of guys, so that’s been a real positive. I think hopefully we continue to play smart. We talk about being a smart football team and that’s a team that doesn’t go out and beat itself, a team that plays penalty-free, that takes care of the ball, that makes a smart play on a down-by-down basis. It’s hard to exist in this program if you’re not a smart player."
No room for dummies or lazy guys. Study or get out.