A theory is an explanation, by definition, and explanations are not something we observe. What we observe is evidence, and theories are the explanations we construct to make sense of what we observe.
Yes a theory is an explanation or definition, a great many of which have been and are proved wrong over time. Theories can and have been proved wrong, while scientific observable facts, cannot. People come to different conclusions or theories regarding largely the same evidences. This because people most often develop theories in order to support that which they have already determined or consider likely. YEC's, OEC's, and or atheistic evolutionists, each having different perspectives or views to support with the theories they work upon regarding these differing faiths. Which themselves are largely built upon the faiths of many before them, with these exact intentions in mind.
Your category mistake here renders your subsequent remark accidentally ironic: "Deep-timers, therefore, have learned nothing regarding established and/or observed and verified facts."
There is nothing ironic about the statement you refer to above. Deep time theories are not built upon observed verified facts, but rather there interpretation of those facts, with quite a bit of presumption thrown into the mix. Presumptions built upon their deep time faith, which apparently, most of them do not want to admit of. Rather claiming their faith and or trust in observations made by many before them, to be facts. Which they are not. YEC's on the other hand, admit of their faith based assumptions from the get go.
What observable facts do young-earth creationists have that old-earth creationists do not?
Let me expound upon and or restate the point I was intending to make which you have questioned above. The observable facts are the same for both groups. Though each might downplay or ignore facts which cause problems for their chosen theories. YEC's do not have more facts supporting their view because the number of facts is greater, but simply because they do not have to explain nearly as much as deep timers do and must. YEC's observations of the facts only need to explain as far back as the creation 6000 years ago, and do not even attempt to explain the exact how of creation and or theories concerning evolution. Accepting that which holy scripture plainly states, regarding special creation by God, concerning processes and powers far beyond our present ability to understand let alone explain.
Deep timers on the other hand, most of whom are evolutionists I do believe, must theorize and extrapolate far more extensively upon the scientific facts which are available to all. Stretching these theories and therefore their own speculations regarding the facts available to all, over an ever increasing depth of time and suggested events of simple to complex evolutions regarding the same.
At the same time, there are observable scientific facts which do support and therefore may be applied to young earth theories, which cannot or do not support deep time theories. Catastrophism, which YEC’s have always believe in and is increasingly being acknowledged by deep time evolutionists, is by nature supportive of YEC’s views. It may be acknowledged by deep timers as true, but does not naturally support deep time slow development scenarios. Though it may be accepted by deep timers as a repeated phenomenon through extension of theorized deep time scenarios.
The same may be deduced regarding the observable factual evidence which naturally supports a YEC’s views of a global flood. While such an event produces major problems for the slow deep time processes of evolutionary theory, representing a major interruption of such theorized processes. YEC’s have need to speculate or theorize regarding such, while deep time evolutionists must develop extended theories concerning continual and repeated smaller scale floods and catastrophes to account for the same observable evidence. Although now, many do subscribe to near global flood events brought on by large meteor impacts upon the planet. Yet further extending speculations and theories regarding the same evidence.
There is also the matter of the continued factual observations of complexity being found further and further back in time, than deep timers once thought or allowed for. Evidence which once again naturally supports the idea of complexity from the beginning, as YEC’s believe, but cannot be admitted of by deep time evolutionary theorists. As such is detrimental to their views, or at the very least, has forced them to continually increase the amounts of time involved in their theory. So that in these respects just to mention a few, YEC’s do actually have more observable factual evidence which naturally supports their views, without continued extensive speculation and or theory to adapt to the same.
No sense in bypassing the issue of complexity itself regardless of time factors in relation to development. The harder and deeper we look, the more we factually observe, that there does not appear to be any simple life form. Everything appears to be amazingly complex. This is of course, naturally supportive of the idea that God created all things complex and fully functional from the beginning. Yet requires far more speculation and theorizing if it be attributed to deep time slowly developing simple to complex evolution. Which has lead evolutionists to begin generating theories concerning much more rapid changes than once believed and or taught. Based upon newer observed rapid changes which have been recorded. Imagine that. No revisions or changes in YEC beliefs were or are necessary to such discoveries of course.
I could go on addressing adjusted deep timer views regarding fossilization, rapid formation of coal, oil, stalactites, stalagmites, gems, diamonds, and so on and so forth, according to increased information regarding such. Such would be very time consuming though. Suffice it to say, that such increased knowledge about much more rapid formation of all of the above, required no adjustments for YEC’s as such is naturally supportive of their views. Which more recently developed observable facts are not indicative of, or naturally supportive of deep time scenarios. Though deep timers once used these formations to support their theories while most believed that these formations required deep time.
One more case deserves mention as well. The discovery of soft tissue in dinosaur bones, that’s right bones, not fossils. Such again requires little to no adjustment by YEC’s, while bringing very serious questions and issues to the deep timers table. Requiring new speculations and theories once again, to either explain and or explain away the phenomenon. So I rephrase and or restate my previous position once again - I do believe that YEC’s have more factual evidences which naturally supports their faith and views, than deep timers do or can without increased speculations and theorizing being involved. None of which are factually observed science.
I hope that by "faith" you mean trust, because faith is a sacred thing reserved only for God.
And it requires no more trust than a forensic investigation into a past crime that wasn't observed.
These two above statements appear to be somewhat contradictory. Perhaps I’m not getting exactly what you mean or intend. By faith I mean those whose testimony we believe, trust, and submit to.
Those who place their faith in scriptures do err, for it is in Christ that we should place our faith. He is our savior, of whom all of scripture testifies. "You study the scriptures thoroughly because you think in them you possess eternal life, and it is these same scriptures that testify about me" (John 5:39).
Another seemingly contradictory statement. Rightly dividing the word of God as I understand it, involves knowing the scriptures thoroughly by way of continued prayerful study of the same. Thereby avoiding the detrimental effects of making one portion of holy scripture contradict another. Casting doubt thereby, upon the whole.
2Ti 3:15 And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus. 16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 17 That the man of God may be perfect, throughly furnished unto all good works.
Of course the problem might be with the translation you have chosen, not properly interpreted scripture itself. I believe what you quoted was supposed to be John 5:38 & 39. As that quoted below from the KJV, which seems to convey a very different message than that of your above quote.
John 5:38 And ye have not his word abiding in you: for whom he hath sent, him ye believe not. 39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
Would you mind sharing which translation you quoted from? The difference between it and the KJV is quite shocking. Not to mention the major difference between your version and 2Ti 3:15-17 which I quoted also.