 Grice generalises this definition of speaker meaning later in 'Meaning' so that it applies to commands and questions, which, he argues, differ from assertions in that the speaker intends to induce an intention rather than a belief.Grice's initial definition was controversial, and seemingly gives rise to a variety of counterexamples, and so later adherents of intention-based semantics—including Grice himself, Stephen Schiffer, Jonathan Bennett, Dan Sperber and Deirdre Wilson, and Stephen Neale—have attempted to improve on it in various ways while keeping the basic idea intact.Grice next turns to the second step in his program