| It is amusing to muse about what gives this puzzle its
| We note that the solution-set is non-compact. That is,
| the southern solutions are spectacularly different from
| the northern solution.
| It seems that as a general rule, knowing one solution
| forms some sort of psychological impediment to finding
| other solutions. The mind is attracted to the first
| solution like a moth to candle.
If you are old enough, the question is more or less identical to a
widely spread set of riddles that were spread around in the seventies.
And the description of the problem was followed by the question: What
color are the bears?
This adds further impediment to thinking of the southern hemisphere