Presently we can assert the same fact multiple times and a goal will
return more than once for a single logical 'fact' (duplicate solutions
with identical atoms in the same relation)
That a relation among atoms is satisfiable because asserted should
be a single fact if it is a base fact ( someone can say if that is
Codd/Date Normal form 1 or 2 or whatever for a db relation )
I am going to modify assert to prevent this in my local copy and
see how I do ( no, I am not a prolog purist ... far from it ;-)
To test this, simple assert a knowledge base then reassert it without
first re-setting the base to none. Simple goals that returned one
relation will now return 2
Under Rebol3 we should be able to create a u-def data-type of logicbase!
where a logic-block will behave more like a set than a bag and more
like an ordered-tuple than an array and do smart
join base1 base2
Did you decide not to use object! in favor of a simple block! for
some particular reason?
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For those who doesn't know what prolog.r is - an R package which provides functions for parsing Prolog sentences. It leverages the fantastic SWI-Prolog interactive development environment (IDE) to provide a friendly command line interface, and it can be used as part of an automated workflow. Anyway, that's all I know. Also, please check the link below and discover the best provider of floor cleaning service in Gold Coast, QLD
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