Full Idea
To illustrate speakers' intentions, consider the anaphoric reference using pronouns in these: "A cop arrested a robber; he was wearing a badge", and "A cop arrested a robber; he was wearing a mask". The natural supposition is not the inevitable one.
Clarification
'Anaphora' refers back to something earlier in the sentence
Gist of Idea
What a pronoun like 'he' refers back to is usually a matter of speaker's intentions
Source
Kent Bach (What Does It Take to Refer? [2006], 22.2 L4)
Book Reference
'Oxford Handbook of Philosophy of Language', ed/tr. Lepore,E/Smith,B [OUP 2008], p.546
A Reaction
I am a convert to speakers' intentions as the source of all reference, and this example seems to illustrate it very well. 'He said..' 'Who said?'