Earlenbaugh and Molyneux’s argument against considering intuitions as evidence has an uncharitable consequence — a substantial part of philosophical practice is not justified. A possible solution to this problem is to defend that philosophy must be descriptive metaphysics. But if this statement is rejected, one can only argue (a) that experts’ intuition does constitute evidence, and (b) that philosophical practice is justified by the overall growth of philosophical knowledge it generates.

In this paper, I first develop desiderata for an ontology of intuitions on the basis of paradigmatic cases of intuitions in philosophy. A special focus lies on cases that have been subject to extensive first-order philosophical debates but have been receiving little attention in the current debate over the ontology of intuitions. I show that none of the popular accounts in the current debate can meet all desiderata. I discuss a view according to which intuitions reduce to beliefs, Timothy Williamson's (2004, 2007) account of intuitions as beliefs or inclinations to believe, and traditional rationalist accounts of intuitions. I then show that a widely ignored account of intuitions as appearance states can meet the desiderata best.

Some recent researches in experimental philosophy have posed a problem for philosophers’ appeal to intuition (hereinafter referred to as PAI); the aim of this paper is to offer an answer to this challenge. The thesis against PAI implies that, given some experimental results, intuition does not seem to be a reliable epistemic source, and —more importantly— given the actual state of knowledge about its operation, we do not have sufficient resources to mitigate its errors and thus establish its reliability. That is why PAI is hopeless. Throughout this paper I will defend my own conception of PAI, which I have called the Deliberative Conception, and consequently, I will defend intersubjective agreement as a means to mitigate PAI errors, offering empirical evidence from recent studies on the Argumentative Theory of Reason that favor the conception I defend here. Finally, I will reply to some objections that might arise against the Deliberative Conception, which will lead me to discuss some metaphilosophical issues that are significantly relevant for the future of the dispute about the appeal to intuition.