turn on its head
Flip the premise
To turn something on its head is to reverse or invert it completely, making it the opposite of what it was: The discovery turned conventional wisdom on its head.
The phrase often describes how new evidence or thinking upends established ideas: Her research turned the field on its head.
Sometimes used more loosely to mean radically transform.
subvert
Secretly weaken authority
upset · disrupt · challenge · revolutionize · transform · rethink · reimagine · reframe · shake up · destabilize
reverse
Turn to opposite
overturn · transpose · upside-down · opposite · contrary · antithesis · mirror · switch · reversal · topsy-turvy