 Jackson notes two things. First, these cases are “analogous to what is going on when we utter typical motion ascriptions. We can describe all these utterances as incomplete, in the sense that there is some parameter — a comparison class, a purpose, a perspective or a frame of reference — that must be taken into account if the utterance is to be regarded as expressing a possibly true proposition, and yet the utterance contains no explicit word or phrase that specifies a value for this parameter”. And second, semanticists typically agree on what is going on in (1)–(4): the sentences are simply context-sensitive. There is no need for a fictionalist proposal to explain why in typical utterances of them we express something true. According to Jackson, the same story can be told in the case of motion ascriptions.