Lloyd Humberstone is an Australian analytic philosopher and logician at Monash University, best known for his encyclopedic work on logical connectives and contributions to modal, deontic, and philosophical logic. His research spans the philosophy of language, the semantics of conditionals, and the metaphysics of properties, with particular attention to the formal structure of philosophical concepts. He is regarded as one of the most meticulous logicians of his generation.
Authored The Connectives (2011, MIT Press), a landmark encyclopedic treatment of logical connectives spanning over 1500 pages
Contributed foundational work on two-dimensional semantics and the logic of 'actually'
Advanced deontic logic, particularly temporal and context-sensitive analyses of obligation
Developed rigorous analyses of property types including vector, determinable, and relational properties
Produced influential papers on modal logic, conditionals, and the semantics of philosophical vocabulary
Doug is not obligated at 2 pm to eat a healthy meal at 6 pm