Mary Poppins may be subjectively certain or uncertain as to whether she is suffering from TMDs or a neuropathic or neuromuscular form of OP because uncertainty is a subjective, epistemic state below the threshold of knowledge and belief; hence the term: | Mary Poppins may be subjectively certain or uncertain as to whether she is suffering from TMDs or a neuropathic or neuromuscular form of OP because uncertainty is a subjective, epistemic state below the threshold of knowledge and belief; hence the term: |