I can not find the better variant that was more theoretical with exhaustiveness theorem, but on the practical side this applies to more or less any symbolic sys

I can not find the better variant that was more theoretical with exhaustiveness theorem, but on the practical side this applies to more or less any symbolic system that performs tree search among statements. E.g. https://en.m.wikipedia.org/wiki/Logic_Theorist https://en.m.wikipedia.org/wiki/Logic_Theorist