Presumably he means positive declarative "can", because negative declarative "can" ie "cannot"/"can't" can be. Mmm, that is probably quite difficult to read.Huddleston in CGEL states that declarative 'can' is never epistemic.

Moderators: Dimitris, maneki neko2, Lorikeet, Enrico Palazzo, superpeach, cecil2, Mr. Kalgukshi2
Actually, to my mind it is more sensible to thrash out these modals starting with "can".Interesting that most of the examples seen here revolve around can, which is probably one of the easier modals to narrow down, though how you can get it down to one basic meaning that encompasses I can see... I can hear to mean I see... and I hear when, let's face it, the former is far more widely used without reference to ability or possibililty (at least in British English) is beyond me.
Noone has attempted to narrow should down because even Lewis admits it can't be done.
I should go. It's getting late
You should be so lucky!
Should we narrow this modal down I'll eat my hat.
Yes, that's exactly what I mean. Because of a variety of contexts, any single modal auxiliary will have different interpretations. That variety of interpretations arises solely from the variety of contexts. The modal auxiliary itself, however, has a basic meaning that is flexible. Stephen declares this situation a disaster, but he's dead wrong here. It is the only thing which keeps communication together and sensible for the participants. If an addressee's mind had to process a series of (according to Stephen, up to 5) separate meanings for each modal tossed his way by an interlocutor, it would be difficult to keep up with the conversation. But if, as you and I think is the case, there is a single overarching meaning, one merely has to discern how that meaning makes sense in this particular context. If one cannot, or if one can imagine several possible interpretations, then one will simply ask for clarification. For example, if my roommate talks to someone on the phone, and then hangs up, turns to me and says, "John can come", I can:Take a look at the end of page 103 and the first part of page 104. in TEV.
My problem, Stephen, is that I do not believe what some of the authorities say about modals, simply because what they say does not make sense to me. Just because someone is an "authority", we cannot blindly assume that what they say is true as long as their name is not Lewis. No matter how long your list of authorities is, you have not been able to convince me that Lewis is wrong in this case. His explanation is, to me, the most thoughtful.Stephen wrote:Your basic problem Larry, is that you look at language and see Lewis. even when you find out that his pattern is different from that of most other authorities on the web, your reaction is to read Lewis again for a couple of hours, not read other authorities to try and understand what they are saying.
Whereas you accept this, presumably because it comes from Huddleston rather than Lewis, I do not. I do not believe that there is little difference between "I can hear something rattling" and "I hear something rattling." For me, there is a profound, if subtle, difference. The difference may be hard for some people to articulate, but it is not superficial. And the difference must certainly depend on "can", since that word is the only difference between the sentences. Maybe Huddleston does not see the difference, nor do you, but I do, and M56 does, as do others. Morover, his argument that, "There is, for example, little effective difference between She can speak fluent French and She speaks fluent French because it is not easy to assert the fromer without repeated acutalisations fo the ability" is absurd on its face. The difference lies in what the speaker represents. That is plain to see, if you're willing to look for it. Huddleston introduces an entirely unnecessary complication with his distinction between "potential" and "currently actualized" examples. There is no need for this distinction, since the modal operates exactly in the same way in both examples, to wit: it expresses the speakers judgment of ability.Two subcases can be distinguished; potential and currrently actualized.
Examples:
(i) (Potential) She can run the marathon in under three hours.
(ii) (Currently actualized) I can hear something rattling.
The latter is found with sense verbs and various verbs of cognition and (ii) differs little from I hear something rattling. By contrast (i) differs sharply from She runs the marathon in under three hours. ...... in this potential ability case, the degree of difference from the unmodalised version will depend very much on the pragmatics of the situation concerned. There is, for example, little effective difference between She can speak fluent French and She speaks fluent French because it is not easy to assert the fromer without repeated acutalisations fo the ability.
But you're quite prepared to admit that to the listener both have the same pragmatic meaning. Walks like a duck, talks like a duck ....I do not. I do not believe that there is little difference between "I can hear something rattling" and "I hear something rattling." For me, there is a profound, if subtle, difference. The difference may be hard for some people to articulate, but it is not superficial.
So,There is no need for this distinction, since the modal operates exactly in the same way in both examples, to wit: it expresses the speakers judgment of ability.
According to whom? According to the subject of the verb?Stephen wrote:Dynamic Modality
With 'can' the distinction between this and deontic modality is clear - it is less clear with 'must' for example.
The point is that the source of the modulation is the subject of the verb, just as it is with other catatenative verbs.
The normal sense of 'can' in this type of modality is 'ability' or 'potential'
She can play football very well....
... What is stated as a factual proposition is the ability to play football well...
Larry, I put it like this on my website:According to whom? According to the subject of the verb?
That may be clear to you, Stephen, but it sure as hell ain't clear to me.
No, it isn't clear and it takes a bit of navel-gazing to get it. The subject doesn't actually frame the proposition, of course, indeed the subject may even be inanimate anyway; you project yourself into the subject's viewpoint.Dynamic modality is how the speaker or writer perceives that the subject of the sentence would frame the interpretation of the proposition.
According to whom is irrelevant, Larry. As irrelevant as it is in the sentenceShe can play football very well....
According to whom? According to the subject of the verb?
And you've just pulled the ground from under your feet, because if this is true for every sentence, then it cannot possibly be a distinguishing mark of modality.The simplest, easiest way is usually the right way. Language makers are people, and people rightly want to do the most with the least effort. The simplest thing to remember is the speaker always calls the shots.