The Principle of Sufficient Reason comes from Plato and maybe Socrates before him. We don't quite know because Plato may have put words into Socrates' mouth during the second and third period dialogues that Plato wrote. It has been copied and used by such greats as Thomas Aquinas and others that I forget right now.
The Principle of Sufficient Reason is as follows:
option 1: A either created itself or was uncreated
option 2: A was created by B
let's say for the sake of argument that A was created by B so:
option 1: B either created itself or was uncreated
option 2: B was created by C
let's say for the sake of argument that A was created by C so:
option 1: C either created itself or was uncreated
option 2: C was created by D
This process will continue ad infinitum unless there exists something, at least one thing, maybe more, that were uncreated (simply existed) or created itself. If you deny that such an absolute exists then you hold that all logic is infinitely regressive. If it were so, there would be no reason to discuss anything. Therefore if you disagree with The Principle of Sufficient Reason there's no reason to respond, since everything would be baseless.
Aquinas used this theory in one of his proofs of God's existence.