to me philosophy is a method of thinking, to see things in as many point of view as possible.
while all sciences including philosophy have the ultimate goal of finding truth, there are philosophers that argue that all we know is relative truth, not absolute truth. so if they think they know the truth or is very confident in something, are they really philosophers?
so it comes down to the definition of philosopher, but unfortunately the term philosopher is loosely defined..

in philosophy, there's an art to argue called sophism, and people who practice them are called sophist. i don't remember exactly.....there's a rule called negation of negation (correct me if i am wrong) where when 2 people argue, usually both will settle with a point of view between 2 arguements .