A logical statement combining two statements, truth values, or formulas P and Q in such a way that the outcome is true only if P and Q are both true or both false, as indicated in the table.
The biconditional connective can be represented by
and is read as ‘if and only if’ or ‘iff’ or ‘is equivalent to’. Note that P ≡ Q has the same truth table as the conjunctionwhere → denotes a simple conditional. The biconditional connective itself is also known as the biconditional.
Biconditional. Truth table
A proposition of the form ‘if p then q and if q then p’. It is standardly written p iff q.
- restricted law of specification
- restricted least squares estimator
- restricted three-body problem
- restriction
- restriction enzyme
- restriction fragment length polymorphism
- restriction mapping
- restriction(of a function)
- restriction point
- restrictive practices
- Restrictive Practices Court
- restructuring
- rest wavelength
- resubmission
- resultant
- resultant vector
- resurgence
- resurgent caldera
- resurrection
- resurrection biology
- Resurs-DK1
- retail banking
- retailing, geography of
- retail price index
- retail sales