Related:

• Solutions are obvious if one only has the optical power to observe them over the horizon.
  -- K.A. Arsdall...
• I tell them there's no problems...Only Solutions...
• Logical solutions are not always the most obvious.
• You can't crush ideas by suppressing them. You can only crush them by ignoring them.
  -- Ursula K. LeGui...
• The sunlights differ, but there is only one darkness. -- Ursula K. LeGuin, "The Dispossessed
• Lemma: All horses are the same color. Proof (by induction)
  Case n = 1: In a set with only one horse, it is obvious that all horses in that set are the same color....
• The general root of superstition is that men observe when things hit, and not when they miss, and commit to memory the one, and pass over the other.
  -- Sir Francis Bacon 1561-1626...
• vdiff /vee'dif/ v.,n. Visual diff. The operation of finding differences between two files by eyeball search.
  The term `optical diff' has also been reported, and is sometimes more specifically used for the act of superimposing two nearly identical printouts on one another and holding them up to a light to spot differences....