No, I wasn't suggesting that GREY was a possible answer, only an illustration of the kind of red herring we're up against, i.e. we keep on finding new ones, the only limit being our imaginations.
I did wonder (on Sunday) if the preamble's wording about a 'goal in the search area' might signify THES just as easily as HARE. The problem is that although the long-eared rodent was on a mission to the sun, that was only his ultimate goal, not the goal associated with the trail that we 'solvers' are required to follow.
But nothing can surprise me. It might be the answer.