Maurice Bloch argued that ritual communication is unusual in that it uses a special, restricted vocabulary, a small number of permissible illustrations, and a restrictive grammar. As a result, ritual utterances become very predictable, and the speaker is made anonymous in that they have little choice in what to say. The restrictive syntax reduces the ability of the speaker to make propositional arguments, and they are left, instead, with utterances that cannot be contradicted such as "I do thee wed" in a wedding. These kinds of utterances, known as performatives, prevent speakers from making political arguments through logical argument, and are typical of what Weber called traditional authority instead.