Having looked at Keen's clue selection code, I also notice that the

Having looked at Keen's clue selection code, I also notice that the
intended behaviour of classifying multiplication clues as low-quality
if they only left one possible pair of multiplicands has never
actually worked, because I should have compared the possible clue
count against 2 rather than 1 since the multiplicands can occur either
way round.

[originally from svn r9165]