Which 1746 work by Diderot was condemned by the Parliament of Paris and publicly burned?

Which 1746 work by Diderot was condemned by the Parliament of Paris and publicly burned? Philosophical Thoughts was the book. Denis Diderot published it in 1746 as his first original work, at a time when religious authority and philosophical speculation were closely watched in France.

The book argued that reason and feeling both mattered in moral and intellectual life. Diderot defended a form of deism, criticized atheism, and attacked religious practices involving self-torture. Its combination of religious criticism and independent reasoning made it provocative, even though Diderot had not yet developed the openly materialist views associated with some of his later writings.

In July 1746, the Parlement of Paris condemned the book and ordered it burned publicly. The attempted suppression increased public curiosity and helped the work gain attention. Diderot initially concealed his authorship, so some readers suspected that the author might be Voltaire, Julien Offray de La Mettrie, or Étienne Bonnot de Condillac.

A common mix-up is to confuse Philosophical Thoughts with Diderot's later Encyclopedia project or with Voltaire's philosophical writings. The condemned 1746 title is specifically Philosophical Thoughts.