The title is a contradiction in terms; however, an empiricist may be said to believe until proven otherwise:
1. A proposition for which there is credible evidence.
2. A proposition against which there is no credible evidence.
2.) is more important than 1.) because in practice it enables scientists to quickly zoom in on the truth by not at first wasting time carefully considering propositions with credible evidence against them.
How ironic that the empiricist disparages faith. At the core of his “beliefs” are two propositions that reference “credibility” – in sooth, like his wayward brothers, religious people, even the atheistic empiricist is convicted by empirical evidence of having convictions, beliefs, gut feelings, and intuitions.
What a complex world we live in!