[wjmao88]

<! is less than or not equal right? which is a strict subset of !=, since anything < by definition is !=

[dragonwriter]

> <! is less than or not equal right?

No, it is less-than-not, not less-than-or-not-equal-to.

That is <!x is the same as < (!x); if x is true-ish, it is “< false” and if x is false-ish it is “< true”.