External representations are words and pictures. There is no relationship between the words and the pipe but there is between the picture and an actual pipe. If there was writing describing the pipe, this would be related to an actual pipe. Linguistic representations are not analogical because the relationship between a linguistic symbol and what it represents is arbitrary.
Propositions can be true or false.
Because it is a picture of a pipe, the statement is false. Therefore the statement is true. So if it is true that the statement is false, then it is definitely false. Images are not true or false. An image just is.