[fsloth]

I suppose it isn't, but the categorization is a bit different. For example, Drake takes a concept called "civilization" as given, wheres I stated it's plausible extraterrestrial life would take similar pathways as in terrestrial evolution, and that other terrestrial species have minds that give them in some ways behaviours quite similar to our own (hence increasing the likelihood of extrasolar life having familiar characteristics). The categorizations I listed were in the "self organization emerging from complex systems" tune of things while Drake equation is a bit more hierarchical. But yes, same thing I guess.