 Avicenna talks about three kinds of absolute sentences, all of which are explicated with reference to time. First are absolute sentences that refer to a definite time, but these play no role in his discussion. The other two are the general and the special absolute sentences. General absolute sentences are sentences taken without limitation with respect to time, which means that they have to take in all individuals - past, present and future. Furthermore, the copula is taken to mean that the Bs are As at least sometime, as in ‘Every human is sometimes moving’. A special absolute sentence is a sentence with limitations with respect to time, its subject term referring to individuals at a specific moment in time - although it is not explicated what moment in time that is. The copula is also understood as a conjunction meaning ‘sometimes B and sometimes not B’, as in ‘Everything running is sometimes walking and sometimes not walking’. 