It is inductive reasoning: generalizing from a small sample to a bigger population. Deductive reasoning would be, if the sentences were in the other order. It's also not faulty, as it's not contradictory.
Inductive reasoning is a logical process in which we make broad generalizations or "theories" from the specific observation of an action, event, person, etc. such as in the statement given. The narrator saw an ability (flexibility) in a specific group of people (the wrestlers they have seen), and then determines that all wrestlers must have that same ability.
This type of reasoning is the opposite of deductive reasoning which goes from a general assumption or hypothetical theory to a specific observation "All wrestlers are flexible. Therefore, those men sitting there are flexible too"
The poem "Thanatopsis" was written by poet William C. Bryant. Thanatopsis means "consideration of death" in Greek. In the beginning of the poem, "Thanatopsis", nature speaks to the dead. This poem was sent in to publishers by Bryant's father, without his knowledge, while William was still a young man.
