To reason analogically is to reason that because two or more things or types of things are alike in some one or more respects (we may call this the antecedent resemblance), they will therefore be found alike in some other respect(s) - the consequent resemblance. In cases of reliable analogies the antecedent factor is already known to have some bearing on the consequent factor. In faulty analogies such knowledge is lacking. The form of the argument is: B is like C in respect D; therefore B is like C in respect E.