[math-fun] Don't hire authoritarian programmers

This quick and not at all dirty one liner to draw an orthoscheme, block([o:[0,0,0],a:[1,0,0],b:[0,1,0],c:[0,1,1]],plotfaces(combinations([o,a,b,c],3))) was thwarted by the previous incarnation of this line of code in Macsyma\Macsyma2\share\set2 : /*if not %set=setify(%set) then "Some a&&hole thinks you should be screwed with error(\"First argument to subpowerset must be a set.)",*/ --rwg PS, It can't be news to serious sudokulists, but making the rounds of Mountain View High School is gosper.org/sud5.PNG, a quincunx of overlapping 9x9s with clues in four concentric rings.