What is Stupid? The rejection of the discomfort of intellectual rigor in favor of the mentally comfortable and convenient. Stupid takes many forms, and they change over time, but always reflect an inability or unwillingness to grasp basic reasoning and use of evidence, willful ignorance, conspiracy theories, denialism, lack of perspective, mistaking actions for consequences, substitution of emotion for reason, rejection of evidence that fails to validate pre-existing frameworks. Sound familiar?