It´s funny how you play smart and resort to name calling when you don´t know what to answer.

The concept of speciation is clear.

And it is clear that finch species on Galapagos don´t interbreed and if they do their offspring is not fertile.

Keeping in mind the definition of the word "species" (producing fertile offspring), one might understand how speciation works.



It´s easier to admit something than resorting to stupid comments.