United States Supreme Court
To survive a motion to dismiss, a complaint must contain sufficient factual matter to state a claim for relief that is plausible on its face; conclusory allegations are not enough.
Ashcroft v. Iqbal established the "plausibility" standard for federal civil pleading, requiring that a complaint plead factual content that allows a court to draw a reasonable inference that the defendant is liable, affirming and extending the standard set in Bell Atlantic Corp. v. Twombly.