[ivanv]

hi there spaceboys and spacegirls 

has anyone been involved with computer cognitive systems other than predicate system and neural networks? or experimented with the same?

[mendicott]

Can you provide links to 3 examples of "predicate systems" ?

[ivanv]

higher order logic:             http://en.wikipedia.org/wiki/Higher_order_logic
calculus of constructions: http://en.wikipedia.org/wiki/Calculus_of_constructions
type theory:                     http://en.wikipedia.org/wiki/Type_theory

i cannot think of anything else

[mendicott]

That's just abstract theory.  I want to see examples of concrete implementations.

[infurl]

That's just abstract theory.  I want to see examples of concrete implementations.

Wise posters leave concrete implementations as exercises for the reader.

You don't really expect us to do your homework for you, do you Marcus?

[ivanv]

 
actually i've done some experiments with implementing functions in pure propositional logic using resolution rule. in these examples i've selected boolean functions for a sake of simplicity. i assume that other functions can be implemented too. some background knowledge about propositional logic (http://en.wikipedia.org/wiki/Propositional_logic) and resolution rule (http://en.wikipedia.org/wiki/Resolution_%28logic%29) is required.

function types in propositional logic can look like this:


types could be deduced by applying resolution rule from following set of formulas. of course, some converting of resolution results from conjunctive normal form to above form (which express complex consequences) is required. these folrmulas look like this:


so, how to use these functions?
first, convert them to conjunctive normal form, as with standard procedure for deducing in propositional logic. next, if we want ie. to get result of function "T & F", we have to give following sentence (which also has to be converted to conjunctive normal form) to system:
And & (p1 -> T & p2 -> F)
then, when we apply resolution rule to this and above sentences, we get as result:
F
of course, other results deduced from the same set of sentences also might be important, although i didn't found their purpose. maybe in some complex type system?

that's about it. thought someone might be interested. greetings from zombie room...

[DaveMorton]

The only problem I have with all that, Ivan (aside from the fact that it's beyond my knowledge level) is that the images aren't showing up. I suspect that it may be a DNS resolution problem, which certain members have experienced here before, and is therefor not your doing.

[ivanv]

The only problem I have with all that, Ivan (aside from the fact that it's beyond my knowledge level) is that the images aren't showing up. I suspect that it may be a DNS resolution problem, which certain members have experienced here before, and is therefor not your doing.

i've updated original post with attachments reflecting first and second image.
thank you very much for your interest.

[DaveMorton]

Much improved, thank you.

[mendicott]

Andrew, as my niece is fond of saying, "if its not on Facebook, then it didn't happen" .. ;^)

[ivanv]

Hello GeekCaveCreations

I'm really curious, what inference rules is Morty using? isn't it a predicate system?

[DaveMorton]

Morti is a 'multi-tiered educational platform', in that he's the platform I'm using to learn the basics of AI, beginning with AIML (which isn't really AI at all, but a simple pattern matching response system) and moving forward from there. His next 'tier' will be a hybrid platform, mixing some rudimentary NLP/grammar parsing with a more advanced type of pattern matching system (e.g. ChatScript) which will be designed to 'build' responses to questions and statements, rather than simply 'parrot' what's stored in his database. I've still got a lot to learn about various aspects of this next part, so it will be a while before I'll have anything to show. Till then, Morti will still be a whimsical little smart-alec, sitting not-so-quietly in his own little corner of the internet.

[ivanv]

Morti is a 'multi-tiered educational platform', ...

gee, this is entirely new area to me 
thanks!

[DaveMorton]

Well, it sounds good "on paper", but in truth, Morti came about as a way to learn both my first steps in AI, but also to try out new concepts and ideas in PHP. He's my second "testing framework" for learning something without actually taking courses or classes in my chosen area of study. My first "testing framework" is a chatroom script called pChat, that began in 2002-3 as a "language port" of a PERL script called "Blue Chat". That particular script has evolved from a simple, flat-file based script, with no features beyond a choice of four text colors and only a single 'area' to chat in, to a database driven, feature rich 'house', with multiple rooms, private messaging, emoticons, a huge number of text style choices, and even a virtual telescope (when you're in the Observatory, at least), and has served to help me learn a great deal of new ideas in PHP and MySQL. I hope that Morti will help me do the same with AI, over the next few years.