Logical fallacy

Well I have yet to find an example of a logical fallacy as we were discussing in class on Monday but I thoroughly enjoyed the short film we watched on Here Be Dragons. Our teacher brought up why we should believe what we were told and how we can know its knowledge. I am not completely sure. I feel logically and that with my reason by considering what he said, it makes sense. He wasn't denouncing things completely or without cause. He was simply stating how there was no science to back it up and I love that because that works with my brain. Logical thinking and proof and science and math and rules all work in my mind. This film seemed to tell us to think my way. Thats a first in philosophy that keeps throwing new ideas to us left right and center. I do understand and agree with some of whats discussed but too often I don't agree with just one persons opinion. I follow parts of each one. For example I support Hume for his reasoning behind simple ideas and denouncing complex ideas(Hume and reasoning...ironic i think) but I also support Descartes for his ideas of reason and its benefits but i don't agree with either that either perception is the only tool of knowledge or that reasoning defeats all else. The four forms of knowledge rely on each other to function. Knowledge would be difficult to pass on or explain without language, perception often gives us ideas to reason about and Emotion helps us reason and perceive since it is a sense that can sometimes distinguish between right and wrong suboconsciously. Thats a broad statement.... hmm oh well its late. Ta ta for now.