Nicky Ryan

Nicholas Dominick Ryan (born 1949 in Dublin, Ireland) is an Irish music producer, recording engineer and manager for the musician Enya. Nicky was also manager of Clannad, a group of Enya's family and the band she first performed with. Nicky is credited with first introducing the layering of Enya's voice, creating Enya's distinctive style.

In the Seventies and Eighties Nicky was highly regarded as a live sound engineer working with artists such as Gary Moore, Planxty and Christy Moore. He also worked as a teacher at St. Mary's School For Deaf Girls, where he experimented with sound engineering, to allow the pupils to feel the bass in the music more.

He worked with the Irish group Clannad as sound engineer from 1975 and then manager from 1976, inviting Eithne (Enya) to join in 1979. Nicky and Eithne left Clannad in 1982, shortly after the completion of the album Fuaim.

Enya and Nicky now have their own studio, Aigle Music, in Dún Laoghaire, Ireland. Nicky Ryan is also married to Enya's lyricist Roma Ryan.

If and only if

↔⇔≡
Logical symbols representing iff

In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statements.

In that it is biconditional, the connective can be likened to the standard material conditional ("only if", equal to "if ... then") combined with its reverse ("if"); hence the name. The result is that the truth of either one of the connected statements requires the truth of the other (i.e. either both statements are true, or both are false). It is controversial whether the connective thus defined is properly rendered by the English "if and only if", with its pre-existing meaning. There is nothing to stop one from stipulating that we may read this connective as "only if and if", although this may lead to confusion.

In writing, phrases commonly used, with debatable propriety, as alternatives to P "if and only if" Q include Q is necessary and sufficient for P, P is equivalent (or materially equivalent) to Q (compare material implication), P precisely if Q, P precisely (or exactly) when Q, P exactly in case Q, and P just in case Q. Many authors regard "iff" as unsuitable in formal writing; others use it freely.

Only If...

Only If... is a pop song by the Irish artist Enya. It was released along with her first greatest hits compilation Paint the Sky with Stars on 3 November 1997. It charted in several countries and its video was noted for its creative direction.

Track listing

Charts