Consider the following premises. For all x_6, if x_6 were an electrician, then x_6 is climbing a mountain. For all x_6, x_6 will play squash if and only if x_6 will climb a mountain. For all x_6, if x_6 plays squash, then x_6 is an electrician. Can we infer the following from them? For all x_6, if x_6 plays squash, then x_6 is climbing a mountain.
Yes.