But Einstein could make no use whatever of a theoretical psychological psychophysical construction of the objective being of Mr. Michelson; rather, he made use of the human being who was accessible to him, as to everyone else in the prescientific world, as an object of straightforward experi ence, the human being whose existence, with this vitality, in these activities and creations within the common life world, is always the presupposition for all of Einstein's objective scientific lines of inquiry, projects, and accomplishments pertaining to Michelson's experiments.