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Not quite the problem. I want to find out if ALL the things pass the tests and, if so, under which instantaiont of variables

i.e.

ALL x in list. EXISTS sigma. believe(x.sigma)

so basically if I'm say I believe "sky is blue", "blue cow is blue", "blue cow has four legs" and I'm looking to see if I believe

EXISTS x. "x is blue" AND "x has four legs"

then I loop

believe?: x is blue
candidate: x = sky
believe?: x has four legs (when x = sky)
FAIL.
back track
believe? :x is blue
next candidate: x = blue cow
believe?: x has four legs (when x = blue cow)
SUCCESS
end loop

I've realised I need to implemented depth-first search in Java, its now a question of the most efficient way to do that with the iterators I already have for checking "believes" and returning candidates.

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purplecat

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