>>18Are you retarded? PIE is the foundation of modern comparative linguistics and arguably modern linguistics as well as the resources that were used to codify it were used to make just the innovations that led to universal grammar. I highly doubt you know anything enough about this subject to refute it. But as I have said, PIE is an accurate model that accurately explains consonant and vowel shifts and morphological features across multiple generations and branches of Indo European languages. Tell me your retarded proposal that accomplishes as much.