disjunction
hedging to add to coverage cases where alternative is true
trimming content to cases where alternative is false (= trimming content to common content of the two alternatives)
simple conditional
hedging to add to coverage cases where antecedent is false
trimming content to cases where antecedent is true
unless conditional
hedging to add to coverage cases where subordinate clause is true
trimming conent to cases where subordinate clause is false
only-if conditional
hedging denial to add to coverage cases where subordinate clause is true
trimming content of denial to cases where subordinate clause is false