Revision by Conditionals: From Hook to Arrow
  The belief revision literature has largely focussed on the issue of how to
revise one's beliefs in the light of information regarding matters of fact.
Here we turn to an important but comparatively neglected issue: How might one
extend a revision operator to handle conditionals as input? Our approach to
this question of 'conditional revision' is distinctive insofar as it abstracts
from the controversial details of how to revise by factual sentences. We
introduce a 'plug and play' method for uniquely extending any iterated belief
revision operator to the conditional case. The flexibility of our approach is
achieved by having the result of a conditional revision by a Ramsey Test
conditional ('arrow') determined by that of a plain revision by its
corresponding material conditional ('hook'). It is shown to satisfy a number of
new constraints that are of independent interest.
