Implement AlwaysLink (for-all link in pattern matcher) #2288
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Per discussions in #2203 -- The
PresentLinkin the pattern matcher is akind of
ThereExistsLinkbut custom tailored so it can be used with thepatten matcher. So of course, we need something analogous to a
ForAllLink.Since that name is already taken by PLN, for a kind of ScopeLink, it seemed
easier to just introduce the
AlwaysLink. It is not clear if aNeverLinkis needed.(because "not always" is "sometimes")
This is just the most basic, bare-bones implementation. More complex uses are
probably buggy.