Full Idea
Science aims to give us theories which are empirically adequate; and acceptance of a theory involves as belief only that it is empiricially adequate.
Gist of Idea
To accept a scientific theory, we only need to believe that it is empirically adequate
Source
Bas C. van Fraassen (The Scientific Image [1980], p.12), quoted by J Ladyman / D Ross - Every Thing Must Go 2.3.1
Book Reference
Ladyman,J/Ross,D: 'Every Thing Must Go' [OUP 2007], p.95
A Reaction
This won't tell us what to do if there is a tie between two theories, and we will want to know the criteria for 'adequate'. Presumably there are theories which are empirically quite good, but not yet acceptable. Theories commit beyond experience.