From the Earth to the Moon


A group of men have been launched into space. After the initial explosion that set everything in motion, they found there was little to do but sit around and theorize. Below are comparisons between positions the men have made so far in their scientific sparring.

Arrows point to aspects of a position that are superior to their counterparts; X's indicate non-comparable aspects according to the four mutually-exclusive systems being employed. One of the positions here - ironically, the one that they use as the basis for comparison - has a dominantly superior solution. What is it?