Does it make sense to develop and defend a theory that says that all human activities, including that of developing theories and defending them, are ultimately the product of external causes over...

Does it make sense to develop and defend a theory that says that all human activities, including that of developing theories and defending them, are ultimately the product of external causes over which we have no control and for which we are not responsible? Does determinism imply that our philosophical beliefs are as much the outcome of a series of causes as is the production of an egg within a chicken? Does it follow from this implication that you are conditioned to be either a determinist or a libertarian and there is nothing you can do about it? If so, is this conclusion a problem? Is there any room in such a theory for notions such as rational or logical or even true? If not, is the lack of such notions a problem for this theory?