Definition
A biconditional relation is a relation between a consequent and a condition. The consequent is true or in force if and only if the condition is true, with the result that there is a conditional relation in both directions between the related propositions.
Examples
(English)
If and only if he goes, I go.
Note: This sequence also has the incidental meaning of If I go, he goes.
Sources 1
- Comrie 1986, 79