The scientific chamber opera (Speech and music, effability and ineffability), which I was sure would only ever have one performance at its premiere at the International Conference on Music Perception and Cognition, was performed again this year, in revised version, at the International Conference on Cognitive Science.
Speech and music, effability and ineffability is a chamber opera, performed as a plenary session at the International Conference on Cognitive Science, held at Sydney in 2003.
Although the debate was about as serious as one might expect from an opera, the issues discussed are scientifically interesting and the background paper from the proceedings is on the same site.
To say that something is "ineffable" means that it cannot or should not, for overwhelming reasons, be expressed in spoken words.
It is generally used to describe a feeling, concept or aspect of existence that is too great to be adequately described in words, or that inherently (due to its nature) cannot be conveyed in dualistic symbolic human language, but can only be known internally by individuals.
Ken Wilber describes the ineffable in A Brief History of Everything as being akin to climbing a ladder then pulling it up after oneself.