 However, Brentano’s view of perception could gain plausibility by contrasting it with a form of doubt that is also non-epistemic and directly opposed to it. If I see a yellow canary, that very act could make it incorrect to raise a doubt of a non-epistemic kind. If doubting can be like acknowledging an object-directed act with a non-propositional content, then Brentano’s Polarity thesis stands. If not, we must either revise the Polarity Thesis or Brentano’s view of perception.