Does accepting 'That is not entirely true, for linguists know too much about language to suggest that there ever was, literally, a single language from which all Indo-European languages descended.' as true logically compel one to accept 'The one language from which all Indo-European languages descended will be announced soon.'
That is not entirely true, for linguists know too much about language to suggest that there ever was, literally, a single language from which all Indo-European languages descended.###The one language from which all Indo-European languages descended will be announced soon.