The following wellknown argument illustrates the danger in r

The following well-known argument illustrates the danger in relying too heavily on diagrams.3 Find the flaw in the ‘‘Proof.’’ (The proof uses familiar high school notation that will be explained later in this textbook. For example, AB denotes the segment from A to B and (\'AB denotes the line through points A and B.)

Solution

I think the diagram is not attached in the question and the question is incomplete. For example the argument is not provided.