It is natural to group these four considerations into two main kinds: the first two invoke a truth-tracking defense of expressive liberties, while the second two appeal to a distinctive kind of value that free discussion is supposed to have.
Unlike those movements, this one invokes something that bleeds from the checkout aisle into daily lives.
One invokes feelings of superiority close to contempt, the other inferiority and envy.
So, when one invokes the "ultimate argument for realism" and uses the success of contemporary molecular genetics to infer the approximate truth of the underlying ideas about heredity, one is not arrogantly denying the natural rationality of the Polynesians.
When Maria Barbosa, the oldest and most voluble of the three, invokes "the will of God" to describe her existence, largely dependent on the kindness of strangers, she voices a life-sustaining faith.
If one invokes prior structural knowledge, usually that the crystal is composed of discrete atoms of known atomic numbers, then the observed magnitudes are, in general, sufficient to determine the positions of the atoms, that is, the crystal structure.
Mr Obama has already rejected one: invoking the 14th amendment to the constitution, which says the validity of America's debt "shall not be questioned".
Our favorite was the one invoked by Elyse Kaye, a senior product manager at Black & Decker, at the company's shredder display: "It is so important to shred".
This was no celestial God whom one invoked while sending up incense and prayers; this God was right there, and we were in the divine presence at the heart of the heart of the faith.
(One piece, "The First Thing," lasts all of a minute and consists of the performer Ed Rapley giving voice to a first reaction to his audience of one, invoking in this instance my receding hairline. Gee, Ed...) Conversely, intimacy and kindness are the hallmarks of two pieces containing Nurse in the title.
