is there such a thing as a sharp square? someone who is super square
I would say a good capper with bad discipline and money management falls into this description.
Think of someone who hits over 60% one 1 or 2 sports/leagues but plays his losing sports/leagues anyway, the why don't matter, can be because he thinks he can beat it and just needs to keep trying using new angles; or simply because he is an action junkie that when up 10 units in the day and felt he was losing money by not betting the next game, an addict, a compulsive Joe.
A person like this I would say has a talent but lacks self control and discipline. This happens more often than people think and a lot of you break even guys that post here would be winning ones if you had more restraint. I include myself in this category.
Acting upon impulse is a frequent human condition that affects human performance in ANY field and is a very silent enemy