When Tom devises a coat of arms for Jim, what evidence is there that his knowledge of these things is really quite superficial?in The Adventures of...

Tom's explanation of the symbols he uses for Jim's coat of
arms reflects his awareness that there are specific names given to specific parts of the
seal and a standardized language used to describe those elements. However, Tom doesn't
know what the actual terminology is and, as a result, can't use the correct terms for
the parts of the coat of arms he has created. "Dexter" is the term used to refer to the
left side of the shield, not along the top as Tom says. The term "nombril" refers to the
center point of the shield, not a collection of "nombril points." He has the basic idea
of what should be included in a coat of arms, but doesn't have the vocabulary to
correctly name the elements.