In propositional logic, the conjunction of two formulas Phi and Psi, written Phi & Psi, is true if both Phi and Psi are true, otherwise it is false. The truth table of conjunction is therefore as follows:
Phi Psi Phi & Psi 1 1 1 1 0 0 0 1 0 0 0 0
Conjunction is also used in the sense 'coordinator or subordinator' (see conjunction (i.e. connective)).
Gamut, L.T.F. 1991. Logic, language, and meaning. Chicago: University of Chicago Press.