Originally posted by FISHY1118
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I don't think it has been shown anywhere that the 5:30 ToD is flawed, at least not more than the earlier ToD theory. It is not conclusive, but that isn't the same thing. Nothing in JtR is conclusive, so not being conclusive isn't really a flaw. By the same token, the "pre-4:30 ToD" could also be said to have been shown to be flawed because it is not conclusive either. In the end, the earlier ToD theory is more "flawed" than the 5:30ish ToD theory, though.
We have two explanations, neither of which can be said to be conclusive, and so we are left in a situation where we have to rank them. And yes, there are rules by which theories are ranked, and one of those rules is how much of the data do they explain. The 5:30ish ToD theory explains, or can account, for all of the relevant testimony (it accounts for Richardson, Long, Cadoshe, Dr. Phillips, the legging spring, the open door, and why the mutilations might appear more skilled - better light - than in some other cases, like Eddowes which was in the dark). Moreover, this explanation is robust, meaning, even if we question various parts of the evidence (i.e. Long), the theory holds up - we can make some wrong "guesses" and the theory does not come crumbling down. The pre-4:30 ToD requires additional speculations (Long must be wrong; Richardson must be wrong/lying; Cadosche must be wrong; there's another explanation for the open door; the legging spring is a coincidence) and it is not robust - all of those speculative explanations must be guessed correctly otherwise the theory gets falsified. It is a far more fragile explanation.
Being the more fragile, however, doesn't mean it couldn't be the right one, but possible doesn't mean probable. It is not simply a matter of coming up with a possible explanation, as those are a dime a dozen. Rather, in our evaluations, we need to look at which explanation accounts for the evidence more simply (one aspect of theory evaluation is its simplicity - all the "Richardson was lying" type statements are additional layers of complexity that simply do not exist in the 5:30 theory - no, the idea that the testimony is honest is the default, it isn't a layer of explanation), and which explanation is the more robust (we can make some mistakes yet the theory continues to stand - the 5:30 ToD theory does not hinge on any particular guess to be correct, while the earlier ToD theory requires all of the guesses to be correct, one wrong guess and the whole theory shatters).
So while one is fully free to continue to build upon the earlier ToD theory, the rules by which theories are evaluated are not open to us for change, and by those rules the earlier ToD is a distant 2nd in terms of its "goodness of fit". That's not a debate, or an opinion, that's just how the evaluation comes out. But because the evidence is not conclusive, you can still, if you wish, prefer the earlier Tod, but it is not the better theory because its flaws are more severe.
- Jeff
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