Any semantic theory is bound to presume some structure in the messages it analyses, and the success of the theory depends on getting this structure right. But discovering this structure is the business of grammar. Therefore grammar is a necessary preliminary to semantics. Semantic theories of conditionals vividly illustrate this. All presume a provably untenable ternary structure: antecedent, operator, consequent. And all can be shown committed as a result to a thoroughly unbelievable set of connections between sentences and their informational (...) burdens. Actually, a conditional has five immediate factors, none of them an antecedent or a consequent. (shrink)