 Tony Street (2002, 2004) has identified three things that make logic Avicennan as opposed to Aristotelian: (1) truth-conditions of absolute (or assertoric, i.e., non-modal) sentences are expressed in modal terms; (2) logical properties of so-called descriptional (wasfi) sentences, such as ‘Every B is A while B’, are studied; and (3) syllogisms are divided into connective and repetitive. If a logician adopts (1)–(3), he is following Avicenna, according to Street. 