Relative clauses are commonly placed after the antecedent that the relative pronoun describes. The fallacy is similar to affirming the consequent and denying the antecedent. A counterfactual statement is a conditional statement with a false antecedent. Evaluation of an implication starts through repeated attempts to evaluate the antecedent. In forward chaining an antecedent fires and asserts the consequent. The first is true since both the antecedent and the consequent are true. A conditional sentence contains an "antecedent" and a "consequent". Pinker prefers the terms "quantifier" and "bound variable" to "antecedent" and " pronoun". Rules are of the form of an implication between an antecedent (body) and consequent (head). Also, pronouns are sometimes used without any explicit antecedent. IIIc nouns are an Old French creation and have no clear Latin antecedent. The use of the terms "antecedent" and "subsequent" is ambiguous. The linguistic term that is closely related to "antecedent" and "proform" is "anaphora". The Akkadian term is assumed to be derived from a Sumerian antecedent. Some proforms lack a linguistic antecedent (or postcedent).