Imperfect Cognitions

In this post, Joe Pierre, professor of psychology at UC San Francisco, discusses his recently published book, False: How Mistrust, Disinformation, and Motivated Reasoning Make Us Believe Things That Aren’t True (OUP, 2025) False As a psychiatrist, my clinical work as a psychiatrist through the years has focused on the treatment of people with psychotic disorders. But in my academic work, I’ve been drawn to the grey area between psychopathology and normality and especially the continuum of delusion-like beliefs and full-blown delusions that includes religious, ideological, and conspiracy theory beliefs. In psychiatry, false beliefs like cognitive distortions or delusions are typically chalked up to psychopathology. People have cognitive distortions because they have major depressive disorderand people are delusional because they have schizophrenia. And although research might tell us that delusional thinking can be attributed to anomalous subjective experiences or a “jumping to conclus...

Today's post is by Simon Barker (University of Tartu) on his recent paper, "Epistemic health, epistemic self-trust, and bipolar disorder: a case study " ( Synthese 2025). Simon Barker Four years ago, I was diagnosed with bipolar disorder (and later, ADHD). My mind soon after returned to the point when my PhD studies were violently derailed by what I now see as a mix of depression and mania. Then, it took an extended break and inordinate support from my partner, supervisors, and other staff in the Sheffield philosophy department to get me over the line. Now, from my post-diagnosis vantage, I saw that those struggles fit a pattern. My bipolar disorder (and ADHD) and intellectual life have always fluctuated together – as if the same thing. My depressions comes with intellectual disinterest, crashing confidence, and an inability to think; my manias with an urgent flame of intellectual grandiosity yet thoughts racing too fast to make sense of. This entangled mental health an...