A measure of the alcohol content of liquor. Originally, in Britain, 100 proof was defined as 57.1% by volume (not used anymore). In the US, 100 proof means that the alcohol content is 50% of the total volume of the liquid, and thus, absolute alcohol would be 200 proof
A sequence of statements consisting of axioms, assumptions, statements already demonstrated in another proof, and statements that logically follow from previous statements in the sequence, and which concludes with a statement that is the object of the proof
Any effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial
A proof is an impression of a print pulled prior to the regular, published edition of the print A trial or working proof is one taken before the design on the matrix is finished These proofs are pulled so that the artist can see what work still needs to be done to the matrix Once a printed image meets the artist's expectations, this becomes a bon tirer ("good to pull") proof This proof is often signed by the artist to indicate his approval and is used for comparison purposes by the printer An artist's proof is an impression issued extra to the regular numbered edition and reserved for the artist's own use Artist's proofs are usually signed and are sometimes marked "A P ", "E A " or "H C " (Cf glossary of abbreviations) Commercial publishers found that there was a financial advantage to offering so-called "proofs" for sale and so developed other types of proofs to offer to collectors, generally at higher prices
The quality or state of having been proved or tried; firmness or hardness that resists impression, or does not yield to force; impenetrability of physical bodies