I propose a third option: that the answer depends on perspective. Carl Sagan said: "To make an apply pie, first create the universe."
From one perspective yes, that claim seems technically true...but it seems very odd. On the other hand: no would be our everyday answer, and doesn't seem entirely correct either.
Working closely with HPS experts in revolutionary scientific during the next revision of TR support guidelines may not be specific enough for some.
If we believe one only has...
...then even if we receive serious, cautious answers, it is hard for us to avoid interpreting them as ...
.
My memory is pretty dodgy, so I don't recall this ever being mentioned as a specific topic previously in this thread, which forces me to ask: What / where have claimed what leads to scientific revolutions?
If you refer to something like "problem solving" in the Nersessian model, I would respond that for Edwin Hubble, the most obvious anomalous data problem was the redshift, which he solved by development of an explanatory model. For Rutherford, the anomalous deflection of alpha particles described at:
http://en.wikipedia.org/wiki/Ernest_Rutherford#Rutherford_and_the_Gold_Foil_Experiment
are what I think a reasonable example of the problem which he worked to solve for about 2 years, succeeding with the nuclear model.
I take it as progress to simply have more precise & accurate models, so to me, understanding the structure of scientific creativity as starting with anomalies that become regarded as anomalies needing explaining, and how problem solving leads to beneficial ideas, etc., to me this understanding is likely to be a benefit to scientists even if they can't state exactly how.
BTW - Good questions.