Meaning 2
Previously
X means Y just if X is a reliable indication of YLameen Souag asked a good question
how would [meaning as reliable indication] account for the fact that lies have a meaning?
Lies
Second, when we have seen through a lie, we do use the term "meaning" in that way. When you know that someone is a liar, you might say "what she says doesn't mean anything" (doesn't reliably indicate anything). Or you might speak of a meaning that has little to do with the lie's literal words, but accords with what it reliably indicates: "When he says `trust me', that means you should keep your wallet closed."
Language interpretation
To understand utterances divorced from who actually says them, we use a consensus of how to transform from words and constructions to indicators; a language.
Don't throw away the context, though. We divorced the utterance from its circumstances and viewed it thru other people's consensus. We can't turn around and treat what we get thru that process as things we directly obtained from the situation; they weren't.
If Sabrina was reliable in her speech (wouldn't lie etc), we could take a shortcut here, because viewing her utterance thru others' consensus wouldn't change what it means. But she isn't, so we have to remember that the reliable-in-the-consensus indicators are not reliable in the real circumstances (Sabrina's Ebay postings).
So when interpreting a lie, we get a modified sense of meaning. "Consensus meaning", if you will. It's still a meaning (reliable indication), but we mustn't forget how we obtained it: not from the physical situation itself but via a consensus.
The consensus / language
Not all interpretations are created equal
For instance, we can deduce that she committed fraud (taking the report as true).
At the start of our reasoning process, we only know her locutionary act - the physical expression of it, posting 'new computer for sale'. We don't assume anything about her perlocutionary act - convincing you (or someone) that she offers a new computer for sale.
- She knows the language (Assumption, so we can skip some boring parts)
- You might believe what she tells you (Assumption)
- Since the iterm is actually an old mop, making you believe that she offers a new computer is fraud. (Assumption)
- Under the language consensus, 'new computer' reliably indicates new computer (common vocabulary)
- Since she knows the language, she knew 'new computer' would be transformed reliably-in-the-consensus to indicate new computer (by 1&4)
- Reliably indicating 'new computer' to you implies meaning new computer to you. (by definition) (So now we begin to see her perlocutionary act)
- So by her uttering 'new computer', she has conveyed to you that she is offering a new computer (by 5&6)
- She thereby attempts the perlocutionary act of persuading you that she offers a new computer (by 2&7)
- She thereby commits fraud (by 3&8)
(Late edits for clarity)