そんないいわけは、認めるわけにはいけません。

such (about the actions of the listener, or about ideas expressed or understood by the listener); like that; that sort of

excuse; explanation

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

to recognize; to recognise; to observe; to notice; to deem; to judge; to assess; to approve; to deem acceptable; to allow; to admit; to accept; to confess (to a charge); to watch steadily; to observe carefully; to renown; to give renown to; to appreciate; to acknowledge

conclusion from reasoning, judgement or calculation based on something read or heard; reason; cause; meaning; circumstances; situation

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

if ... then; when; and; why don't you...?; the more (one does something); because; since