¶ 1. This is an insurance duty-to-defend case. The usual mechanism for determining
*716
whether an insurer owes a duty to defend is the "four corners" of the complaint.
Doyle v. Engelke,
¶ 2. We hold that the most recent decisions from our supreme court have tacitly overruled court of appeals and supreme court opinions which recognized exceptions to the four-corners rule. Because the complaint in this case alleges an intentional act by the insured and because the insurance policy excludes such intentional acts from coverage, we hold that the trial court properly ruled at summary judgment that the insurer owed no duty to defend.
FACTS AND PROCEDURAL HISTORY
¶ 3. James B. Sustache, a teenager, was killed as the result of a punch thrown by Jeffrey W. Mathews, another teenager, during a physical altercation between the two during a party. Sustache's parents and his estate sued Jeffrey and his insurer, American Family Mutual Insurance Company. The amended complaint alleged that Jeffrey had committed an intentional battery against James and that Jeffrey's actions were willful, wanton and malicious warranting an award of punitive damages. 1 Jeffrey affirmatively defended on *717 the grounds that he was exercising his right of self-defense when he delivered the fatal blow to James during the fight.
¶ 4. American Family moved for summary judgment, arguing that it had no duty to defend Jeffrey. As factual support, American Family relied on the allegations in the complaint that Jeffrey had acted intentionally, willfully, wantonly and maliciously and on the policy provision excluding such acts from coverage. As legal support, American Family cited to the four-corners rule, which holds that an insurer's duty to defend is measured solely from the allegations contained in the complaint, not extrinsic facts.
See Atlantic Mut. Ins. Co. v. Badger Med. Supply Co.,
¶ 5. Jeffrey resisted the motion, relying on
Berg v. Fall,
¶ 6. In a written decision, the trial court acknowledged the factual similarity of this case with
Berg.
But the court also noted that the supreme court had criticized
Berg
in
Doyle
and reaffirmed that the four-corners rule was the law in Wisconsin.
Doyle,
DISCUSSION
¶ 7. We review a decision on summary judgment using the same methodology as the circuit court.
See Green Spring Farms v. Kersten,
¶ 8. The legal issue is whether the four-corners rule is absolute or whether it is subject to the exception adopted by the
Berg
court when the insured defends
*719
against an intentional act allegation on the basis of self-defense. However,
Berg
was not the first Wisconsin appellate court to recognize an exception to the four-corners rule. Twenty years earlier, the supreme court recognized exceptions to this rule in
Grieb v. Citizens Casualty Co.,
¶ 9. In Grieb, a taxpayer suit alleged that Grieb, an architect, had engaged in a conspiracy with another to defraud Milwaukee county. Id. at 556. Grieb successfully defended the suit and then commenced an action against his insurer to recover his costs and fees. Id. at 554. The issue before the supreme court was whether Grieb's professional liability errors-and-omissions insurance policy covered the allegations in the taxpayer's complaint. Id. at 556. The policy covered Grieb's liability "arising out of any act of negligence, error, mistake or omission in rendering professional architectural services." Id. at 555. The insurer claimed it owed no coverage, and hence no duty to defend, on the basis of the policy exclusion for "dishonest, fraudulent, criminal or malicious acts or omissions and those of a knowingly wrongful nature intentionally committed." Id. at 556.
¶ 10. The supreme court agreed with the insurer. The court said, "We think [the insurer's] duty to defend under its policy is not so broad as contended for by [the architect]." Id. In so holding, the court followed what is now known as the four-corners rule: "It is the nature of the claim alleged against the insured which is controlling even though the suit may be groundless, false or fraudulent." Id. at 558.
¶ 11. Although holding that the insurer owed no duty to defend under the four-corners rule, the supreme court noted certain exceptions to the rule:
There are at least four exceptions to the general rule determining the extent of the insurer's duty to *720 defend and generally the insurer who declines to defend does so at [its] peril. These and allied problems are extensively covered in Anno. Liability InsurerDuty to Defend, 50 A.L.R. (2d) 458.
Grieb,
[T]here are also a number of cases involving special situations not covered directly by the general rules .... These special situations exist particularly where there is a conflict of allegations and known facts, where the allegations are ambiguous or incomplete, where the allegations state facts partly within and partly outside the coverage of the policy, and finally where the allegations contain conclusions instead of statements of facts.
C.T. Drechsler, Annotation, Allegations in Third Person's Action Against Insured as Determining Liability Insurer's Duty to Defend, 50 A.L.R.2d 458, §3 (1956) (footnotes omitted).
¶ 12. That brings us to
Berg.
There, Berg sued Fall and his insurer alleging injury as the result of a physical altercation with Fall.
Berg,
*721
¶ 13. Ironically, the
Berg
court cited to
Grieb
for the four-corners rule,
see Berg,
The insurer cannot safely assume that the limits of its duties to defend are fixed by the allegations a third party chooses to put into his complaint, since an insurer's duty is measured by the facts, particularly where the pleadings allege facts that are within an exception to a policy but the true facts are within, or potentially within, policy coverage and are known or are reasonably ascertainable by the insurer.
7C Appleman, Insurance Law and Practice, sec. 4683 at 56 (1979).
Berg,
¶ 14. Shortly after
Berg,
a different district of the court of appeals issued its opinion in
Professional Office Buildings, Inc. v. Royal Indemnity Co., 145 Wis.
2d 573,
¶ 15. That brings us to the supreme court's two post -Berg opinions in which the court significantly distanced itself from the Berg holding. In Doyle, the supreme court said:
*722 [The insurer] would have this court adopt the language of the decade old court of appeals decision, Berg v. Fall,138 Wis. 2d 115 ,405 N.W.2d 701 (Ct. App. 1987), indicating that courts may be allowed to go beyond the four corners of a complaint when determining whether coverage exists. The language in Berg is, however, contrary to a.long line of cases in this state which indicate that courts are to make conclusions on coverage issues based solely on the allegations within the complaint. Accordingly, we reject [the insurers'] proffered frame of analysis and confine our analysis to the four corners of the complaint.
Doyle,
¶ 16. As
Doyle
and
Smith
demonstrate, the supreme court has distanced itself from
Berg
with language that clearly supports American Family's contention that
Berg
has, at least tacitly, been overruled. But it remains that the supreme court has not expressly overruled
Berg.
So, like the trial court, we are confronted on the one hand with
Berg,
a published opinion of the court of appeals which stands unreversed, thereby constituting binding precedent that we are not free to ignore or overrule.
See Cook v. Cook,
*723 ¶ 17. However, the dilemma in this case goes beyond the tension between Doyle/Smith and Berg. If we should hold that the supreme court has tacitly overruled Berg, it remains that Grieb, a supreme court opinion, is still on the books, and no court of appeals or supreme court opinion has ever called Grieb into question. So the issue before us implicates Grieb as well as Berg, a matter that we also noted in our certification. 2
¶ 18. To further complicate the matter, the court of appeals decision in
Professional Office Buildings
holds that the four-corners rule is the proper framework for resolving a coverage determination no matter how well reasoned foreign authority to the contrary might be.
Professional Office Bldgs.,
*724
¶ 19. With the supreme court having declined our certification, it falls to us to resolve the conflicts in the case law on these various levels. However, our resolution of these conflicts will be much briefer than our presentation of them. When decisions of the supreme court are in conflict, we follow the court's most recent pronouncement.
Kramer v. Board of Educ. of the Sch. Dist. of the Menomonie Area,
¶ 20. That said, we think this issue warrants supreme court comment at some point in the future. While the four-corners rule probably produces the correct result in most cases, it is not beyond the pale to imagine a situation where the true facts of the event under inquiry call for coverage but the third party's complaint fails to reveal those facts. In that setting, it would seem that the insured should be entitled to a defense for which the insurer has been paid a premium. The four-corners rule shuts down that entitlement. On the other hand, there may be cases where the rule works to the detriment of the insurer. If the true facts known to the insured and insurer, but not alleged in the
*725
complaint, reveal no basis for coverage, the insurer is nonetheless required to provide a defense.
See, e.g., Cook v. Ohio Cas. Ins. Co.,
CONCLUSION
¶ 21. Doyle and Smith hold that the four-corners rule represents the current state of the law in Wisconsin when measuring an insurer's duty to defend. As such, the supreme court has tacitly overruled Grieb and Berg. Since the four corners of the plaintiffs' complaint alleges an intentional act by Jeffrey and since the American Family policy excludes coverage for such an act, we uphold the trial court's grant of summary judgment to American Family.
By the Court. — Order affirmed.
Notes
The plaintiffs' complaint also alleged that Jeffrey was negligent in failing to first inquire of James whether James was the person who had earlier called him on his cell phone baiting Jeffrey to fight the caller. However, the plaintiffs do not make *717 any separate argument as to how this claim might survive if we reject their argument that the trial court erred. We therefore do not further address this claim.
The complaint also alleged a claim for parental liability against Jeffrey's father pursuant to Wis. Stat. § 895.035 (2005-06) and a claim against the host of the party for illegally providing alcohol to a minor pursuant to Wis. Stat. § 125.07. However, neither of these defendants resisted American Family's motion for summary judgment and, based on their failure to respond, the trial court granted summary judgment to American Family as to these defendants. This ruling is not challenged on this appeal.
All references to the Wisconsin Statutes are to the 2005-06 version unless otherwise noted.
We have considered whether the supreme court's reference in
Grieb
to the exceptions to the four-corners rule might be dicta since, other than acknowledging the exceptions, the supreme court did not further recite the exceptions or elaborate on them.
Grieb v. Citizens Cas. Co.,
