Double negative would have found a more flattering way to say so. Instead, some kind of problem is implied, though Mr. Jones possesses basic competence at his tasks. Discussing English grammar, the term "double negative" is often though not universally applied to the non-standard use of a second negative as an intensifier to a negation. Double negatives are usually associated with regional and ethnical dialects such as Southern American English, African American Vernacular English, and various British regional dialects. Indeed, they were used in Middle English. Historically, Chaucer made extensive use of double, triple, and even quadruple negatives in his "Canterbury Tales".
Quadruple reed to play". Presumably a quadruple reed is folded twice, in opposite directions, instead of once (\/\ or \/\/ instead of \/ shaped), or either folded twice in the same direction or wrapped around (◎ instead of ○ shaped). Both options could result in what may be considered a doubly thick double reed. Quadruple reed A quadruple reed is a type of reed by means of which the sound is originated in various wind instruments. The term "quadruple reed" comes from the fact that there are four pieces of dried palm leaf vibrating against each other, in pairs. A quadruple reed,