In a particular sense of the term science, yes. Although winning may imply a bit more of the political, which many have said is not a science.
Ah, sheesh, cornelis, funny how language and metaphors intrude upon what would be an idealistic "pure" science. I use 'winning' to carry continue in the context of "competing theories". The intelligent designers would like to have us believe that a theory, when imperfect, falls flat on it's face in the absence of a competing theory.