For the full details we refer to the original Otter manual . The following remarks, however, concerns primarily the basic SCAN interface. Clauses are simple disjunctions whose variables are implicitly universally quantified. Otter's inferences operate on clauses. When formulas are input, Otter immediately translates them to clauses.
Comments can occur within terms.
Comments are not echoed to the output file. Names can be used for variables, constants and function symbols. Determining whether a name is a constant or a variable depends on the context of the term. A name in a formula is a variable if and only if it is bound by a quantifier. Terms and Atoms Constants and variables are terms.