Dymanic said:
I don't disagree with any of that.
No, I agree that it is. I would remind you first: that I made no such argument, and second: it still doesn't mean that we can know everything.
I'm not saying we know we can know everything. In fact, it is quite clear we can't when it comes to random processes, for example. Chaotic systems pose similar problems.
My point was that we can't make claims due to our ignorance. You began to step onto those shifting sands when you wrote: "How many currently widely held conclusions were without evidence fifty or a hundred years ago?" The rational response to that is "So what?" It is no cause for speculation-cum-assertion or speculation-cum-claim.
Science is not a crystal chandelier hanging in the hall of truth, and the successes you speak of did not spring fully-formed into the world.
Where did I write that they did?
They have no sacred status; they are themselves corrections of earlier errors (some of them rather embarassing).
You're confounding several different things here, as well as posing false dichotomies, and strawmanning what I wrote. Nothing in science has a sacred status. It is all provisional, and, yes, science proudly and boldly asserts that its processes are self-correcting.
I did not claim successful theories sprang fully formed. They are developed after the painstaking shedding of hypothesis after hypothesis. Sometimes, after the toppling of previous theories. In each and every case, however, two very important points need to be noted: 1) most of what went before was preserved, not tossed out and 2) the new knowledge was vetted through the same basic scientific processes.
It is with those two latter points that I am very comfortable in refuting your image of science not being a crystal chandelier hanging in the hall of truth. It most assuredly is. It most assuredly has earned its epistemological privilege.
I don't agree, but I wasn't proposing to do that anyway. Your haste in making such assumptions (in fact your posting style in general) does suggest frustration, born (I presume) of... shall we say 'a plethora of creative ideas'. If that is the case, I can relate to that. My backup explanation is that it comes from just plain orneriness (which I deny relating to, even if everyone who knows me does claim to see it).
I think you misunderstood my comment about shooting fish in a barrel; I was writing about how scientists shoot down one another's ideas and proposals.
It's more than that. Many ideas are dismissed on sight, undissected. We do this not because it is the ideal way, but because it is the only practical way. But we have no perfect universal template for assessing truth value on sight; if any of what we reject contains truths which could only be found by sifting every grain, we're going to miss them. Our ruthlessness has a price.
It is called Occam's razor, dynamic. And your portrayal of it missing several important points. 1) It is not done for fun. 2) It is not done without a sound basis. 3) It is done with a universal template, called, again, Occam's razor. 4) The price of the ruthlessness only seems high because you have not examined the price of wasting our time with stuff for which we have no evidence.