Now, let's look at the word 'excellent'
In it's finite and unversed form.
Excellent of the higheset quality,
Or exceptionally good at, or of it's kind,
Or superior in it's archaic definition,
Synoptic or in congruence with altruism or benevolence,
Depending on the usage of the original word or it's derivative.
Example at hand: two glasses of water,
One sprung from a porous material which liquid is passed
In order to separate the liquid or the fluid from suspended particles;
In short a filter, and the second glass taken from a spiget
Or a plug for a bunghole not to be confused with
A bunghole that produces fecal matter,
But in fact the latter example would be considered
Dist-tasteful or shall I say the more laymen term
Of crappy and the first excellent.
Now, let's look at excellence in art.
Excellence in art not to be confused with
Medioacracy or luke warmness
Lyrics taken from http://www.lyricsmode.com/lyrics/p/propaganda/excellent_analogy.html