RFLMAO

Tufts The Cat wrote in
. 97.131:

quoted from AP article
Among the scientists who torpedoed "pluton" were geologists, who
pointed out somewhat embarrassingly to astronomers that it's already a
prominent term in volcano science for deep igneous rock formations.

"What were they thinking? The reaction in the geologic community was
rolling of eyes," said Allen F. Glazner, a geologist at the University
of North Carolina. "It would be like botanists trying to distinguish
between trees and shrubs and coming up with the term 'animal.'"
end quote

So which is IAU, tastes great or less filling?

Less filling.