Does anyone know if there is there a name for the idea that new concepts (such as negative numbers, complex numbers or type constructors in a type system) are only ever introduced into a preexisting "system" so that they can be eliminated later, after helping make some progress?
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Yet, they have not been eliminated, have they?
We eliminate their uses in the answers. The idea that if the problem space doesn't have them, then we need to eliminate them in any useful solution.
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Not always. The discovery of the positron was due to Dirac's unwillingness to eliminate a negative solution.
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