Quotes from Alan F. Chalmers

The point is that if the knowledge that provides the categories we use to describe our observations is defective, the observation statements that presuppose those categories are similarly defective.

It would seem that the scientific revolution involved not just a progressive transformation of scientific theory, but also a transformation in what were considered to be the observable facts!

Aunque un enunciado pueda ser calidicado de hecho observable porque ha superado todas las pruebas a las que se le haya sometido hasa cierto momeno, esto no quiere decir que necesariamente superará los nuevos tipos de prueba posibles a la luz de los adelantos en el conocimiento y en la tecnología.

One attempt to avoid the problem of induction involves weakening the demand that scientific knowledge be proven true, and resting content with the claim that scientific claims can be shown to be probably true in the light of the evidence. So the vast number of observations that can be invoked to support the claim that materials denser than air fall diWInwards on earth, although it does not permit us to prove the truth of the claim, does warrant the assertion that the claim is probably true.