I am thinking about the criteria for credibility. It appears some miraculous events are readily believed, whereas others are not. Personally I was thinking credible miracles are things that could possibly (although extremely improably) happen naturally (e.g. a cure of leporsy, stopping of a storm)- but then the loaves and fishes do not fall into this category.
Another criteria is that credible miracles (in most cases) seem to help people- whereas the clay bird seems like just a display. But then, does walking on water help people?
QLTH
Now I see where you are coming from. This issue is one of the few meeting places between Faith (the christian variety) and Science (allegedly “reason”) where parties actually see a common subject matter which enables communication (that doesn’t mean agreement!). Since the birth of modern Science Religion has been seen as irrelevent (not agree, not disagree, just irrelevent) to Science, they never seem to address the same subject matter and can live together with a polite passing nod in the hallway. The strange thing is the founding “Scientists” (of the 1600s/1700s) were mostly very religious persons.
The arguments over “truth” and certainty (of concern to both Faith and Science) look to have come to the fore around the late 1600s with the huge kudos Netwon gave to what is now probably called Physics. He convincingly predicted the paths of the planets using “Science” (a completely new way of doing things that contradicted much of Aristotle’s Natural Philosophy and methods. Aristotle’s principles and use of reason (in a particular way) have been used for centuaries to support Catholic Faith).
Miracles of the Bible (and elsewhere) thus became problematic for the new “scientific” mind. The universe has been shown by Newton to run by internal clockwork - we just have to take the lid off to find the principles … then all is explicable. (“Materialism”) There is no ghost in the machine (religion).
Educated men of Faith (there weren’t many educated women) now suffered terribly from schizophrenia. How to resolve the contradiction? Go for an emotion based religion and metaphorically shoot one’s brains out? Accept the new scientific way as absolute truth and abandon relgion as superstitious (e.g. Bertrand Russel) - painful as such an existence may be to the heart that longs to worship? Or find a middle path (Deism) where God gets re-interpretted as the great Clock Maker (a very insipid rationalistic Christianity)?
And the official Church initially reacted by shutting the doors so the simple faithful wouldn’t have their minds and values polluted (it labelled everything of this ilk “Modernism”.) Unfortunately the doors didn’t get closed in time and the “infection” spread to Biblical Scholarship (e.g. Bultmann and many theologians who simply discarded the miraculous as apriori impossible, and therefore re-interpretted what the purpose of miracles in the Bible really is - a literary device). I recall being shocked at 13 when the new lay teacher (I was taught previously by nuns/brothers) suggested Jesus used psychology in the loaves/fishes to make people unselfishly share hidden food. Thankyou Bultmann.
Yes, this is a big topic and I could rave on - most people don’t realise it Christianity is still reeling from these punches. Your questions suggests you are aware of the inconsistancies of different groups, even within the Church, on these matters.
I do not believe one is a bad scientist (read “irrational”) if one believes in the possibility of the miraculous. Personally I have never witnessed one but I am open - though I am a skeptic and believe corn-circles and alien abductions are not in this class.
I do accept the existence of the preternatural order (as does the Church) and there are, for example, many convincing accounts of levitation both inside and outside of the church that cannot be dismissed easily (unless one does not believe in this sort of possibility to start with). Personally I accept that the strange goings on at Garabandal are too well documented to be denied or rationalised away (what they mean is another matter). Medjugorje on the other hand appears to have difficulties in this regard and reports of the miraculous are not as professionally documented and appear to depend on a lot of subjective experiences making them less credible from a scientific perspective (strangely the devotion here is extremely intense).
It must also be remarked, and philosophers of the scientific method largely accept, that the truths of science are not absolute - they are in the end only highly “probable.” That is why it takes only one new experiment to disprove a scientific “law” even if 100,000 before have “proved” it. Thus Newtonian Physics, held as absolute truth for 200 years or so, was found to be flawed. (It works at the macro level well enough but not at the micro level).
The real question, as you point out, is what is the purpose of Jesus’ miracles. Its about engendering faith (which is not the same as causing faith) - another very difficult topic.
But I have raved and reached my word limit!