A Defeating Objection to Dynamic Block Theories of Time

McTaggart's argument against he reality of the A series (or some variation on that argument) poses a serious problem for the moving-now block theory of time (MNBT). A defender of MNBT can respond along the lines suggested by Broad: by denying that we should understand 'e was present' as saying that e is present at some past moment t. There is, however, a serious—plausibly defeating—objection to this type of response: it implicitly denies a non-negotiable platitude about time. As a result, MNBT is not tenable. Growing block theories are also defeated by a similar objection.