[...] would the elephants evolve to be tusk-less? The word »evolve« in that sentence means exactly what you say, »thrive and outcompete regular elephants«, or

[...] would the elephants evolve to be tusk-less? The word »evolve« in that sentence means exactly what you say, »thrive and outcompete regular elephants«, or at least that is the way I wanted it to be understood. What is your definition of that word in that context that makes the sentence mean something different?