Consider the following premises. If Elisabeth plays squash, then Susan is a poet. For all x_14, x_14 is a cashier if and only if x_14 is curious. If Susan were a poet, then Barbara is curious. Can we infer the following from them? If Elisabeth plays squash, then Barbara is a cashier.
 From the fact that for all x_14, x_14 is a cashier if and only if x_14 is curious we can infer that for all x_14, if x_14 were curious, then x_14 is a cashier. From the fact that for all x_14, if x_14 were curious, then x_14 is a cashier we can infer that if Barbara were curious, then Barbara is a cashier. From the fact that if Elisabeth plays squash, then Susan is a poet, and that if Susan were a poet, then Barbara is curious we can infer that if Elisabeth plays squash, then Barbara is curious. Finally, from the fact that if Elisabeth plays squash, then Barbara is curious, and that if Barbara were curious, then Barbara is a cashier we can infer that if Elisabeth plays squash, then Barbara is a cashier. Therefore, the answer is yes.