 Logic for Anderson is concerned with statements, and not with questions, commands, prescriptions, exhortations or other forms of expression. Logic is concerned fundamentally with statements that raise an “objective issue” and these other forms of speech do so only indirectly (JAA, Lectures on Scientific Method, c.1950). Discourse implies a common logic of assertion, implication and definition (EMP, 6). Apparent differences in logical form are due simply to different modes of expression. Any statement, if it is saying anything at all, can be shown by transformation into logical form to be asserting some matter of fact: a description of a certain thing as being of a certain kind, a claim that something is the case. Anderson’s students were set a range of statements to be transformed into one of the four Aristotelian propositional forms, traditionally designated as the A, E, I and O forms. In any field, until questions or issues are posed in one of these four propositional forms they will inevitably be confused and potentially misleading bases for inquiry.