Definition of "indefensible"

The president evidently intends to follow his own misguided calculus. A decision to withdraw would be indefensible. It is important to understand why and to consider what we need to do next.

2017 May 31, Todd Stern, “Leaving the Paris Agreement Would Be Indefensible”, in The Atlantic‎

Killing civilians is indefensible, whether done by Hamas or Israel [title]

2023 October 12, Rajan Menon, “Killing civilians is indefensible, whether done by Hamas or Israel”, in The Guardian‎