Such a conjunction of patterns might seem to be mere chance, perhaps, the way distant cloud chambers might display seemingly identical trails of particles.
When such a conjunction of factors is conditioned on, those factors are said to be "held fixed".
Such a conjunction of factors did not take place at any other point in the twentieth century.
However, this leaves open the question of how such a conjunction of behaviours could arise to begin with.
Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.
First, (e) is not a member of a world-type-for-Oscar, inasmuch as (e) is neither a "counterfactual of freedom," the negation of one, nor a conjunction of such "counterfactuals of freedom".
One can define a contradiction as a couple of sentences, one of which is the negation of the other, or as a conjunction of such sentences.
A conjunction of properties such as being a vertebrate, being warm-blooded, having live births, hair or fur, an external ear, lungs and a diaphragm, etc., distinguishes the set of mammals from other living organisms.
But when the target is defined by a conjunction of features, such as a green square embedded within a display of red squares and green discs, response times increase with the number of distractors (Treisman & Gelade, 1980; Kristjánsson, Wang, & Nakayama, 2002; Wolfe, 1998).
A conjunction of them is harder to imagine.
Similar to Adams' world stories, a 0-place role is a conjunction of purely qualitative propositions that is both maximal (with regard to purely qualitative propositions) and possible: possible world w is a conjunction of purely qualitative propositions such that, for any qualitative proposition P, w includes either P or its complement, but not both.
