140 S. Ct. 344
U.S.2019Background
- Michael E. Mann, a climate scientist, published the "hockey stick" temperature reconstruction; critics questioned his methods after leaked CRU emails.
- Columnists Rand Simberg and Mark Steyn (posts on Competitive Enterprise Institute and National Review Online) used strong language accusing Mann of misconduct and data manipulation.
- Mann sued for defamation in D.C. Superior Court; petitioners moved to dismiss and invoked D.C.’s anti‑SLAPP statute, which requires dismissal for speech on public issues unless plaintiff shows likelihood of success on the merits.
- The Superior Court denied dismissal; the D.C. Court of Appeals affirmed and indicated a jury could decide whether the statements were provably false.
- Petitioners sought certiorari raising two principal constitutional questions: (1) whether provable falsity is a question of law for the court or a question of fact for the jury; and (2) whether the First Amendment permits defamation liability for subjective opinion about scientific or political controversy.
- The Supreme Court denied certiorari; Justice Alito dissented, urging review to clarify the law protecting robust debate on public issues and to resolve the circuit/state split.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Who decides whether a statement is "provably false" (judge as matter of law vs jury as factfinder)? | Mann: jury may determine whether ordinary reader would view statements as factual and whether they are provably false. | Petitioners: courts should decide as a matter of law whether a statement asserts provable facts or nonactionable opinion. | Cert denied; D.C. Court of Appeals treated falsity as a question a reasonable jury could decide; no Supreme Court merits ruling. |
| Whether First Amendment allows defamation liability for subjective opinion about scientific/political controversy (Milkovich line)? | Mann: statements amounted to factual allegations of misconduct (actionable). | Petitioners: comments were rhetorical opinion and protected speech about a public issue. | Cert denied; no Supreme Court clarification; Justice Alito would grant review to refine Milkovich and protect public‑issue debate. |
Key Cases Cited
- New York Times Co. v. Sullivan, 376 U.S. 254 (1964) (First Amendment standard for public‑figure defamation and need to protect robust public debate)
- Milkovich v. Lorain Journal Co., 497 U.S. 1 (1990) (distinguishes protected opinion from actionable statements that imply provable false facts)
- Cox Broadcasting Corp. v. Cohn, 420 U.S. 469 (1975) (addresses jurisdictional and First Amendment concerns about trials that may violate free speech)
- Chambers v. Travelers Cos., 668 F.3d 559 (8th Cir. 2012) (federal rule treating provable falsity as question of law)
- Moldea v. New York Times Co., 15 F.3d 1137 (D.C. Cir. 1994) (federal approach to law/fact distinction on falsity)
- Good Govt. Group of Seal Beach v. Superior Ct., 22 Cal.3d 672 (1978) (state court view that jury decides whether an ordinary reader would construe statements as factual)
- Snyder v. Phelps, 562 U.S. 443 (2011) (protects highly offensive public‑issue speech)
- United States v. Alvarez, 567 U.S. 709 (2012) (First Amendment protection for some false statements)
- United States v. Stevens, 559 U.S. 460 (2010) (robust protection for speech despite low social value)