Pale Fire created by Kinbote, features an entry for a "Botkin, V.," describing this Botkin as an "American scholar of Russian descent"—and referring to a note in the Commentary on line 894 of Shade's poem, in which no such person is directly mentioned but a character suggests that "Kinbote" is "a kind of anagram of Botkin or Botkine". In this interpretation, "Gradus" the murderer is an American named Jack Grey who wanted to kill Judge Goldsworth, whose house "Pale Fire's" commentator—whatever his "true" name is—is renting. Goldsworth had condemned Grey to an asylum from which he escaped shortly before mistakenly killing Shade,
The Missing Shade of Blue people to recognise that there is a missing shade than it is for them to actually form a clear idea of that missing shade. Be that as it may, this dissolving of the problem fails to meet the second and third criteria listed above. Mental mixing is the solution proposed by Morris. The idea here is that just as paints are mixed to produce the range of colour swatches found in a hardware store, so it should be possible for colours to be mixed in the mind in some kind of analogous way. However, without further argument it is not