  According to the contentlessness view, category mistakes are meaningful but fail to express a proposition. An attractive feature of the contentlessness view is that it addresses one of the most pressing objections against the previous two accounts: namely, accommodating the context sensitivity of category mistakes. Unlike grammaticality and meaningfulness, what content (if any) is assigned to a sentence is not a context-invariant property. So one can coherently maintain that ‘This is green’ is perfectly acceptable in contexts where the demonstrative refers to a pen, while lacking content in contexts where the demonstrative refers to the number two.