I kind of understand Piscivore’s position, where everything [observed and used to make a conclusion] is evidence and then after a rigorous examination some evidence is regarded as better evidence than other.
That's an important element you left out. Otherwise, yeah.
I think it’s unnecessary to go that route thou. It doesn’t mean data leading to an investigation are tossed out, more like pending an elevation to become evidence of something.
If it is used to come to a conclusion, it is evidence. Nowhere, anywhere, does it say that it has to be good evidence, or that the conclusion has to be correct. If it is not used to make a conclusion, then it is data, as you say.
Only after having created a feedback loop between signals and conclusions – i.e. having a sufficient framework for interpreting stuff – can we start talking about actual evidence of something.
"Actual" evidence? If by that you mean scientific evidence, sure.
Within the framework we need to show a relationship between data and conclusions and that they indeed correspond, thus we can say there is evidence for conclusion X1, X2…, Xn.
In science, yes indeed. Not all people are scientists, though, and the word applies to them as well.
I assume Pisci’s point is something of a crime scene investigator’s: By sealing off a house where a murder has taken place it’s possible to say that “don’t touch anything, everything in there is evidence”. Although what that statement in actuality means is: “don’t touch anything because something therein could be used as evidence”
Correct. Because before it is observed, it's just stuff.
for a) finding out how the murder took place; b) who committed the murder; c) for convicting the murderer in a trial. A, b and c are different contexts and use different kinds of data – what might be evidence for conviction is not the same evidence as showing how the killing took place (context is key).
If I follow you correctly, yeah, sort of. I'm not entirely sure I do.
He is simply saying that before we start creating a framework for understanding a limited set of data, everything [observed and used to make a conclusion] is evidence, although only some specific data is evidence of a particular conclusion.
Yeah. More or less.
But in reality we must cannot help but always restrict the framework beforehand; this is done by using a set of predetermined knowledge about the world and a specific interpretive point of view.
... formed through a lifetime of other conclusions made with evidence (including conclusions made with other evidence (including conclusions made with other evidence (including conclusions made with other evidence ))) etc., fractaling back to the first time we opened our tiny eyes and made our very first conclusion based on an observation (when and what that is I'll leave to the Psychology department

)
Science is one way to limit the pejoritive effects (and I'm not using that word, well, pejoritively) of that framework.
Understanding that science itself builds a framework of its own, a lot of people mistake the one they were born with for the scientific one.
Thus, a dim cloud seen through a lens is not regarded as evidence for hardly anything of interest in the field of astrobiology; what’s required is a framework, a particular set of observations and a limited set of possible conclusions, before astrobiologist’s can begin to talk about evidence
But understand that religion, conviction bigfeet exist, "wanting to believe" in alien visitors, pathalogical distrust of the government- they all provide a framework. It's not
our framework, but they still make observations, and make conclusions with those observations. We can qualify it wither way (theirs is "poor" evidence, ours is "scientific" evidence) but they use the same process as we do to make their conclusions and so get to use the same word.
– before that, it’s simply data, or potential evidence if the cloud is somehow predicted. To-meh-toe, to-ma-toe… I however think there is a difference between potential evidence for anything and actual evidence for something. Potential evidence for anything is so dim that I would not call it evidence at all, more like data. We can re-evalute some data as evidence at some later time anyway.
What you are describing here is very close to what I'm saying. Data, "potential evidence", are those observations that have not been used to make a conclusion. And not only can we re-evaluate data, we can and do re-evaluate evidence and we can and do re-evaluate conclusions.
When it comes to god-beliefs, and based on what we already know about the world with some certainty, I suspect the question is: should a framework for taking any supernatural force into account be considered at all; is it even meaningful to begin an investigation from that point of view?
It depends on what the new evidence is, doesn't it? With a scientific framework in place, the evidence is going to have to be extraordinary, yes. That's not to say we should leave ourselves open to every outlandish possibily, but it also doesn't mean if someone says they have some extraordinary evidence that we just shoo them off and say "no you don't, you can't possibly, it's not scientific, it's not "really" evidence." Scientifc thinking has changed- sometimes radically- enough times to show that attitude is mistaken. IMO.
The framework could be so outlandish that it might equate to being a waste of time and recourses, without any hope for finding any connection between data and the conclusion.
Could be. Probably is. But data used to make a conclusion is evidence, no mater what the conclusion is, or what other evidence is (or is not) considered.
People can say that it’s as valid as any other context, but is it really? I would say no.
Well, there you're judging the context, the framework. That's fine, but that doesn't mean that the people using the framework aren't using evidence.