Lehmann is a contemporary philosopher working in the philosophy of probability and epistemology. Their work engages with formal approaches to rational belief revision, particularly the comparative merits of entropy-based and classical indifference-based principles for reasoning under uncertainty.
Argued that the principle of maximum entropy offers a more epistemically cautious alternative to the classical Principle of Indifference
Contributed to debates on non-informative priors and formal frameworks for uncertain reasoning
Engaged with Bayesian and objective probability traditions in contemporary epistemology