Never mix power supplies. Just buy a bigger power supply to power 2 cards or something.
You are officially retarded.
Why spread misinformation ?
For multiple PSU : google add2psu
Nowhere he is counter-arguing against using 2 PSUs per se. He is mainly against the OP's usage of power for the same card(s) coming from different PSUs.
Understand the context before you throw random insults around.