A person in a green outfit and helmet is swinging a baseball bat at a tennis ball in front of a fence .
It is highly likely that the guy wearing green is learning how to use a bat by hitting a tennis ball .
It is probably not the case that the guy wearing green is learning how to use a bat by hitting a tennis ball .
It is highly likely that the guy wearing green is learning how to use a bat by hitting a tennis ball .
The guy wearing green is learning how to use a bat by hitting a tennis ball .