*m for 1st & *t for 2nd person in PIE and Proto-Uralic

From: C. Darwin Goranson
Message: 38395
Date: 2005-06-07

As regards this well-known connection,how did it arise? Is this
something that dates back to the divergence of PIE and PU, or is this
the result of deeply intimate borrowing? Certainly such borrowing can
be seen with Finnish yheksän [sic] and kahdeksan )(something akin to
"kaksi" (Finnish "two) + dekm (PIE "ten") + san (less))

If that string of logic has any breaks, please point them out.

But would the use of *m- and *t- in PIE and PU be the result of
borrowing or divergence?