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Related to proofs: Mathematical proofs

110 proof

Extremely strong or potent. Its original sense refers to the alcohol content of liquor. This cleanser is 110 proof. If it can't get the stain out, nothing can.
See also: 110, proof


1. adjective Resilient or impervious to bullets, as of fabric or other material. That bulletproof vest saved my life!
2. adjective Resistant to mishandling, abuse, damage, error, or malfunction. Don't worry about breaking the phone, these new models are bulletproof! We've developed a bulletproof computer program that even the most non-computer-savvy person will be able to use!
3. adjective Extremely well planned or thought out, such as to be impervious to criticism or failure. We have a bulletproof plan for tackling poverty in the neighborhood. My thesis proposal is absolutely bulletproof.
4. verb To make resilient or impervious to bullets, as of fabric or other material. After crime rates rose in the city, many stores began bulletproofing their windows and doors.
5. verb To make resistant to mishandling, abuse, damage, error, or malfunction. Don't worry about breaking the phone, these new models have been totally bulletproofed! We've bulletproofed our latest computer program so that even the most non-computer-savvy person will be able to use it!
6. verb To plan or think something out so well as to be impervious to criticism or failure. Make sure you bulletproof your plan before you submit it to the developers. I spent an extra two weeks totally bulletproofing my doctoral thesis.

burden of proof

The requirement and obligation of providing sound, reasonable evidence supporting a charge or allegation. Originating and used primarily in law, it can be applied more broadly to any situation in which a contentious dispute arises. In court, the burden of proof always rests on the plaintiffs and the prosecutors. The burden of proof is on you to show that the computer was broken before you bought it.
See also: burden, of, proof

put to the proof

To be tested, or to test something. I'm hopeful that the invention will now finally work properly, but it needs to be put to the proof first.
See also: proof, put

the proof of the pudding

The final results, which are the only way to judge something's quality or veracity. Our analysts think that the marketing campaign will reinvigorate our sales, but the proof of the pudding will be in our year-end figures.
See also: of, proof, pudding

proof is in the pudding

Prov. You cannot be sure that you have succeeded until you have examined the result of your efforts. Jill: I think we've done a good job of fixing the lawn mower. Jane: Well, the proof is in the pudding. We haven't tried to mow the lawn with it yet.
See also: proof, pudding

The proof of the pudding is in the eating.

Prov. You don't know the quality of something until you have tried it or experienced it. Theory says that this material will produce a superior widget, but the proof of the pudding is in the eating.
See also: eating, of, proof, pudding

burden of proof

Obligation of proving a disputed charge or allegation. For example, Are you sure you mailed the tax return on time? The burden of proof's on you. A legal term dating from the late 1500s, it has also been used more loosely in recent times.
See also: burden, of, proof

proof of the pudding, the

Results are what count, as in Let's see if this ad actually helps sales-the proof of the pudding, you know. The full expression of this proverb, dating from about 1600, is The proof of the pudding is in the eating, but it has become so well known that it is often abbreviated.
See also: of, proof

the proof of the pudding is in the eating

People say the proof of the pudding is in the eating to mean that something can only be judged to be good or bad after it has been tried or used. Such therapies should not be dismissed out of hand, particularly when the proof of the pudding is in the eating. Note: People often vary this expression, for example by just talking about the proof of the pudding. The proof of the pudding, so to speak, will be if sales of English cheese go up. Note: In this expression, `proof' means the testing of something rather than establishing that it is true. The idea is that the best way to test the quality of a pudding is to taste it rather than admire its appearance.
See also: eating, of, proof, pudding

be (the) living proof that (or of)

show by your or something's existence and qualities that something is the case.
See also: living, proof, that

the proof of the pudding is in the eating

the real value of something can be judged only from practical experience or results and not from appearance or theory.
Proof here means ‘test’, rather than ‘verification’. A garbled version of the expression, the proof is in the pudding , is often heard, no doubt abbreviated for the sake of convenience.
1998 Nigella Lawson How to Eat Don't hide the fact that you're microwaving it: they do say the proof of the pudding is in the eating.
See also: eating, of, proof, pudding

be ˌliving ˈproof of something

show something is true simply by being alive or existing: He plays tennis and golf. He’s living proof that a heart attack doesn’t mean the end of an active life.
See also: living, of, proof, something

the proof of the ˈpudding (is in the ˈeating)

(saying) you can only say something is a success after it has actually been tried out or used: I know you didn’t think it was a very good product, but just look at the fantastic sales figures. That’s the proof of the pudding.
Proof in this idiom refers to a way of testing something.
See also: of, proof, pudding

proof ˈpositive

definite or convincing proof: It’s proof positive of her belief in the company that she’s investing her own money in it.
See also: positive, proof


and proofed
mod. [of an ID card] examined to determine whether one has reached the legal drinking age. Dave got carded at the party even though he is thirty and looks it. As soon as we were proofed, we got in and got some brews.
See also: card


See carded
See also: proof


mod. can withstand idiots who drool. (Of well-written software that even droolings idiots can operate without crashing.) This software package is drool-proof. Even my grandmother could use it.


1. mod. foolproof; not subject to misuse. This scheme is not goof-proof, but it’s pretty sound.
2. tv. to make something foolproof; to take action to see that something cannot be misused. See if this can be goof-proofed by Monday evening.
References in periodicals archive ?
The following lemma says that, under conditions that will arise in the proofs of the main theorems, we can always find two triangles that share a edge, or two tetrahedra that share a face.
Bailey and Borwein point out that mathematical proofs can run to hundreds of pages and require such specialized knowledge that only a few people are capable of reading and judging them.
This has required flexo printers to accommodate these differences in their workflow, via the generation of an adjusted set of films, in order to have press production relate to the proof and have print predictive proofs available for their client," says Sipiora.
Thus, the jurists of early eighteenth-century France (or rather Toulouse, the focus of Silverman's research), despite their familiarity with the doctrine of proofs and its new constitution in 1670, nonetheless continued to regard pain-torture--as meaningful.
Proofing and the approval process in general is a critical step in that process, one that can get bogged down by faxing proofs to clients for review or demand costly overnight deliveries to meet schedule.
The combination of the two technologies will enable customers to quickly and accurately produce and verify spot colors to deliver top quality proofs on an inkjet printer.
Iris ColorZone software ensures remarkable proof-to-proof, machine-to-machine, and site-to-site repeatability, while Profile Wizard allows for the creation of ICC profiles for the best correlation of proof to press sheet.
These results are still preliminary in the sense that they have not been refereed and have not even been submitted for publication," he noted, "but the proofs are--to the best of my knowledge--correct and complete.
Using Otter, McCune and his coworkers have in recent years solved a wide variety of mathematical problems, generating original proofs of theorems in logic, algebraic geometry, group theory, and other areas of mathematics.
This allows customers to produce multiple same-day proofs, which can then be delivered to a number of sites simultaneously.
PROOF-it-ONLINE's no-software application allows creative professionals to post proofs for approval and enables their customers to mark up and review proofs online - within minutes.
Blum has applied the concept of interactive proofs to what he terms "result checking" or "program checking.
Standard posts 1,500 proofs per month for review and at the end of each review, Standard's advertisers receive a reward offer with the opportunity to advertise on Standard Publishing's website for $200.
Careful scrutiny of a recently proposed proof of Fermat's last theorem (SN: 3/19/88, p.