- From: Matt Williams <matthew.williams@cancer.org.uk>
- Date: Wed, 13 Feb 2008 21:08:55 +0000
- To: Alan Ruttenberg <alanruttenberg@gmail.com>, public-semweb-lifesci hcls <public-semweb-lifesci@w3.org>
Dear Alan, Thank you for making my point much more clearly than I managed. I'm a little wary of probabilities in situations like the one you describe, as it always seems a little hard to pin down what is meant by them. At least with the symbolic approach, you can give a short paragraph saying what you mean. I'll try and find a paper on the "p-modals" (possible, probable, etc.) and ways of combining them tomorrow and put a paragraph on the wiki. Matt Alan Ruttenberg wrote: > I'm personally fond of the symbolic approach - I think it is more direct > and easier to explain what is meant. It's harder to align people to a > numerical system, I would think, and also provides a false sense of > precision. Explanations are easier to understand as well: "2 sources > thought this probable, and 1 thought is doubtful" can be grokked more > easily than score: 70% > > -Alan > > On Feb 12, 2008, at 4:03 PM, Matt Williams wrote: > >> >> Just a quick note that the 'trust' we place in an agent /could/ be >> described probabilistically, but could also be described logically. >> I'm assuming that the probabilities that the trust annotations are >> likely to subjective probabilities (as we're unlikely to have enough >> data to generate objective probabilities for the degree of trust). >> >> If you ask people to annotate with probabilities, the next thing you >> might want to do is to define a set of common probabilities (10 - 90, >> in 10% increments, for example). >> >> The alternative is that one could annotate a source, or agent, with >> our degree of belief, chosen from some dictionary of options >> (probable, possible, doubtful, implausible, etc.). >> >> Although there are some formal differences, the two approaches end up >> as something very similar. There is of course a great deal of work on >> managing conflicting annotations and levels of belief in the literature. >> >> Matt >> >> --http://acl.icnet.uk/~mw >> http://adhominem.blogsome.com/ >> +44 (0)7834 899570 >> > -- http://acl.icnet.uk/~mw http://adhominem.blogsome.com/ +44 (0)7834 899570
Received on Wednesday, 13 February 2008 21:09:25 UTC