Is there a fundamental disagreement between '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.' and 'It's unlikely there is only one parent language to all Indo-European languages.'
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.###It's unlikely there is only one parent language to all Indo-European languages.