The glass is half-empty, or half-full is not a joke, but a an ambiguity of language. “Sentence space” could refer to both the sentence itself, numerically quant

The glass is half-empty, or half-full is not a joke, but a an ambiguity of language. “Sentence space” could refer to both the sentence itself, numerically quantified, and the context which makes a sentence grammatically correct, composed of senseable words which go together. Colors don’t walk. Right? My response is just a comment, but even if you disagree with my example, the question remains—what constitutes the space the alternatives are drawn from?