Denny asked: Premise: "An adolescent skateboards at the skate park on the beach in front of onlookers."
Hypothesis: "An adolescent has been skateboarding for two years."
Do we know that the hypothesis entailed by the premise?.
Le: OK, so how can I answer with some explanation?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The adolescent might have been skateboarding for more or less than two years.
The answer: it is not possible to tell.