While clearing snow from the driveway of his home, the plaintiff, Malcolm R. Hayes, Jr., suffered injuries to several fingers of his left hand as he was attempting to remove snow from the discharge chute of a snow blower manufactured by the defendant, Ariens Company (Ariens). Hayes and his wife, Donna, brought suit in the Superior Court seeking compensation for his injuries and for her loss of consortium. The plaintiffs sued on theories of negligence and breach of warranty of merchantability,
*408
alleging that the snow blower was defective in design and that the defendant failed to warn adequately of the snow blower’s dangers. The case was submitted to a jury in the form of special questions pursuant to Mass. R. Civ. P. 49 (a),
Before the jury were discharged, counsel for the plaintiffs informed the judge that in his opinion the special verdicts were inconsistent, stating that it was “impossible to find the defendant to have been negligent in the manufacture of their product and not to have breached their warranty of merchantability. ’ ’ Counsel requested that the jury be told that their verdicts were inconsistent and that they be instructed to deliberate further. The judge denied the request and discharged the jury. Thereafter, judgments were entered for Ariens from which the plaintiffs appeal. We granted the plaintiffs’ application for direct appellate review.
The plaintiffs assert error in four respects: (1) the judge erred in entering judgment for Ariens because the answers to the special questions were inconsistent; (2) the judge erred in refusing to instruct the jury that in a breach of warranty case, when the plaintiff has made a prima facie showing that his injury was proximately caused by a product’s design, the burden of proving that the product is not defective shifts to the defendant; (3) the judge erred in refusing to instruct the jury that in a products liability case alleging negligence or breach of warranty, when the plaintiff has proved an inadequate warning, the burden of proof on the issue of causation shifts to the defendant; and (4) the judge’s instructions improperly took from the jury the issue whether the word “obstructions” on the caution label appearing on the snow blower referred to clogged snow.
We hold that the special verdicts were inconsistent, demonstrating that the jury misunderstood, or at least misapplied, the law. *409 Because it is impossible for us to determine the jury’s reasoning, we reverse the judgments, and we remand the case for a new trial on all issues. We discuss the burden of proof issues since they are likely to arise at retrial. We do not consider it necessary to discuss the plaintiffs’ fourth assertion of error.
There was evidence that on February 7, 1978, Hayes was using a motor driven snow blower that had been manufactured by Ariens in 1961 and that he had purchased from a third party in 1974. Hayes operated the machine while walking behind it. A large auger, known as a rake, pulled the snow into fast moving impeller blades which took the snow and threw it out the discharge chute. The discharge chute was labelled by Ariens with a warning: “Caution: Stop engine before removing obstructions from blower or rake. ’ ’
On three occasions that day the discharge chute of the snow blower became clogged with wet and heavy snow. Hayes twice successfully batted the snow from the discharge chute with his left hand without stopping the engine. When the chute became clogged a third time, Hayes employed the same technique. This time, however, Hayes suffered injuries to several fingers on his left hand when they came into contact with the snow blower’s impeller blades.
The plaintiffs, through an expert, introduced evidence that the defendant’s failure to design the snow blower with a “dead man’s clutch” or an “M wire,” both of which were economically and technologically feasible at the time of manufacture, did not meet design standards accepted by the industry when the machine was manufactured. Furthermore, there was evidence that the design allowed wet and heavy snow to clog the discharge chute and that the machine was difficult to restart after being shut down for several minutes. From that evidence the jury could have found that it was reasonably foreseeable at the time of manufacture that an operator of the machine would have reason to attempt to remove clogged snow from the machine without turning it off. This, in turn, fairly raised the question whether the warning label was reasonably adequate to alert the operator to the risk of personal injury in doing so. The jury could have found that the snow blower was not reasonably safe and that a reasonably prudent manufacturer would have designed it differently or would have *410 affixed a different warning to it, or both, in order to lessen the risk of injury to users of the machine.
The special verdicts that Ariens was negligent and that Ariens did not breach its warranty were inconsistent. The finding that Ariens did not breach its warranty necessarily imported a finding that the product, including the warning label, was reasonably safe, whereas the negligence finding necessarily imported a finding that it was not. A defendant in a products liability case in this Commonwealth may be found to have breached its warranty of merchantability without having been negligent, but the reverse is not true. A defendant cannot be found to have been negligent without having breached the warranty of merchantability. 2
The trial judge correctly charged the jury that in determining whether Ariens was negligent they should consider whether that company exercised reasonable care in the design of the snow blower and in warning potential users of dangers involved in its use. The judge properly charged, in substance, that Ariens was to be held to the standard of care set by an ordinarily prudent manufacturer in the same or similar circumstances as those of Ariens. See
Back
v.
Wickes Corp.,
In support of its contention that the special verdicts were not inconsistent, Ariens relies on
doCanto
v.
Ametek, Inc.,
Liability for breach of warranty is governed by the Uniform Commercial Code, G. L. c. 106, §§ 2-314 - 2-318, and is “ ‘congruent in nearly all respects with the principles expressed in Restatement (Second) of Torts § 402A (1965),’ which defines the strict liability of a seller for physical harm to a user or consumer of the seller’s product.
Back
v.
Wickes Corp., supra
at 640.”
Correia
v.
Firestone Tire & Rubber Co.,
We have concluded that the special verdict with respect to the defendant’s negligence could not properly have been based on the defendant’s failure to give Hayes a post-sale warning. However, even if such a rationale were permissible, the verdicts were inconsistent nonetheless. For strict liability purposes, and therefore for purposes of our warranty law, the adequacy of a warning is measured by the warning that would be given at the time of sale by an ordinarily prudent vendor
who, at that time, is fully aware of the risks presented by the product.
A defendant vendor is held to that standard regardless of the knowledge of risks that he actually had or reasonably should have had when the sale took place. The vendor is presumed to have been fully informed at the time of the sale of all risks. The state of the art is irrelevant, as is the culpability of the defendant. Goods that, from the consumer’s perspective, are unreasonably dangerous due to lack of adequate warning, are not fit for the ordinary purposes for which such goods are used regardless of the absence of fault on the vendor’s part. See
Beshada
v.
Johns-Manville Prods. Corp.,
Since the special verdicts with respect to whether the defendant was negligent and breached its warranty were inconsistent, further deliberations by the jury after appropriate instructions by the judge would have been appropriate. In any event, judgments should not have been entered for the defendant.
We turn to the burden of proof issues raised by the plaintiffs only long enough to say that in this Commonwealth the burden is on the plaintiff in a products liability case to prove his or her allegations of injury as a result of the defendant’s negligence or breach of warranty. It is immaterial whether the defendant is charged with improper design, inadequate warning, or both. We are not persuaded by
Barker
v.
Lull Eng’r Co.,
The judgments are reversed and the case is remanded to the Superior Court for a new trial on all issues.
So ordered.
Notes
Of course, the defendant might not be liable even though a breach of warranty is established. A failure to give timely notice of breach of warranty, if prejudicial to the defendant, constitutes a defense. G. L. c. 106, §§ 2-318 and 2-607 (3)
(a).
Also “[w]hen a user unreasonably proceeds to use a product which he knows to be defective and dangerous, he . . . relinquishes the protection of the law.”
Correia
v. Firestone Tire & Rubber Co.,
“§ 402 A. Special Liability of Seller of Product for Physical Harm to User or Consumer
“ (1) One who sells any product in a defective condition unreasonably dangerous to the user or consumer or to his property is subject to liability for physical harm thereby caused to the ultimate user or consumer, or to his property, if
“(a) the seller is engaged in the business of selling such a product, and
“(b) it is expected to and does reach the user or consumer without substantial change in the condition in which it is sold.
“(2) The rule stated in Subsection (1) applies although
“(a) The seller has exercised all possible care in the preparation and sale of his product, and
“(b) the user or consumer has not bought the product from or entered into any contractual relation with thé seller.”
The “Caveat” follows the recitation of § 402A:
“the Institute expresses no opinion as to whether the rules stated in this Section may not apply
“(1) to harm to persons other than users or consumers;
‘ ‘ (2) to the seller of a product expected to be processed or otherwise substantially changed before it reaches the user or consumer; or
“(3) to the seller of a component part of a product to be assembled.”
