Full Idea
A disjunction is the verbal expression of indecision, or, if a question, of the desire to reach a decision.
Gist of Idea
A disjunction expresses indecision
Source
Bertrand Russell (An Inquiry into Meaning and Truth [1940], 5)
Book Reference
Russell,Bertrand: 'An Inquiry into Meaning and Truth' [Penguin 1967], p.80
A Reaction
Russell is fishing here for Grice's conversational implicature. If you want to assert a simple proposition, you don't introduce it into an irrelevant disjunction, because that would have a particular expressive purpose.