User Portlet User Portlet

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Wow thank you MIchael for the detailed solution! I shall adapt and make use of that code (it will take me a little while to understand all the bells and whistles), since it looks like you have produced a very useful tool for teachers, and for other...
Oh it's definitely a bug! Or at very least an "issue", even if one concludes that using `RegionNearest[]` in this way is a bad thing to do. As Sander's first reply to my post shows above, we get inconsistent results using (-0.5,4) vs. (+0.5,4) even...