Some metaphysical aspects of truth

People make statements that are, 'ex hypothesi', either true or false. The principie of bivalence can be taken as metaphysical necessity, and arguments in support of this thesis are given. Severa! theories of truth are analysed from this point of view, and various truth contexts in which circularity is manifest in different ways are highlighted. It is intended to show that the problem of truth remains a rich and open issue