Tom,
" You assume that historicism drives science -- by what evidence?"
While our increase in knowledge has gone parabolic over the last century and a half, thinking our current state didn't arise and is necessarily based on prior knowledge, as well as beliefs, seems extremely shallow. Everything we are able to perceive is of prior events and the information is a continual process of compilation and distillation. The evidence is so overwhelming I would have to ask you where there is any proof otherwise?! As you have argued, we need a model to make sense of anything, so how does that model come about? Is it just handed down from on high?
"Probably a bit like prospectors who do backbreaking labor for long periods of time for small rewards.'
There is also the fact that many of these advances are professionally competitive, given that accepting some theories will necessarily mean rejecting competing theories.
"That doesn't devalue the worth of the achievements and experiences of the rest of the prospectors"
In theory it shouldn't, but in practice, there do tend to be winners and losers. How much respect do steady state cosmologists draw today?
"That, John, you should realize is an objective statement."
To the extent it is an admission no model is final. It is not that we don't strive for objectivity, but as I keep trying to point out, perception requires a frame of reference. Even deductive reasoning requires first inducing those general principles from sets of observations. Otherwise the alternative is assuming we have discovered some platonic realm of pure knowledge and this is hubris. We extract what we are able. Nothing more and nothing less. We need that frame to distill the signal from the noise. Even laying the groundwork for this frame has taken millions of years and hundreds of thousands of generations, in order for our knowledge to even start to go parabolic and now it seems our main accomplishment will be to destroy our own environment. In which case, our quest for objectivity would be an evident failure.
"String theory is the only mathematically complete theory that unifies all the forces of nature which are already experimentally supported."
What you are saying is that it is the most efficient patch over the gaps in current theory. It would be if an accountant, finding a discrepancy, simply wrote in whatever number required to fix it. Now to be fair, this accountant doesn't yet have access to all the books, so it could be either some prior mistake, or some piece of information not yet acquired. The problem for the scientific method is that if one is simply allowed to insert whatever is required to fix the problems, then there is no way to actually falsify any theory that has managed to become accepted, when any potential falsification simply means projecting some enormous new property of nature.
" a reference to the literature would be helpful so that we have the advantage of knowing who said what, and what they are objecting to."
While they are not something I'm in the habit of saving, here is a recent one. First comment in the comments section.
"The journey is everything."
As the above post shows, yes the journey is everything and very few are willing to turn around and backtrack, if it should lead into the jungle, with no evident path onward.
"More risk, more reward. :-)"
As one having spent their life in horseracing, more risk is also more opportunity for failure :-(
Peter, Tom,
The issue which really needs to be considered in that regard is not one of personal, but institutional bias. That members of a community, having committed their professional lives, are not only not inclined to go against received wisdom, but having developed the perspective of that group, necessarily see everything from the perspective of its model. This goes back to my point that an objective perspective is an oxymoron. The problem then is that for practical purposes, objectivity amounts to a broader, more generalized point of view. One which does try to incorporate multiple frames, but necessarily loses some detail, while those most engaged tend to view the clarity of detail as the highest goal. Specialists vs. generalists. Catch 22. The "shut up and calculate" crowd is not about to turn around and get all philosophical about the journey.
Regards,
John M