I donīt think any long epistles are called for, Jeff. The example you used was one where the bodies had long since grown cold, Chapman was a case where the body simply could not have grown cold in one hour only. End of. Bodies donīt do that.
The reason rectal temperatures are used is because it takes longer for the internal heat to dissipate. Internal temperatures tended to be stable for about 45 minutes in the study I mentioned earlier because it takes that long under those conditions for the internal temperature gradient to reach the core of the body. But since that study was conducted at warmer temperatures than Annie Chapman's body was found, that duration of stability would be longer in the study than for Chapman because the rate of heat transfer for Chapman would be faster due to the larger temperature difference between her body and the external air, and because her body was directly exposed removing any insulating influence of her clothes. She was also cut open, so there was a greater surface area from which heat loss would occur.
It's not an opinion, it's how the physical universe works, these are facts.
You say that the skin grows cold to the touch quickly, and yes it does - but that does not mean that the underlying warmth cannot be felt! Remember that Eddowes was QUITE WARM to the touch 40-45 minutes after she died! And the skin will grow cold on the surface in twenty minutes - or less. So how on earth could Brown feel that Eddowes - whose skin had had TWICE the required time to grow surface cold! - was still "quite warm"? Why did not HER skin grow cold to the touch? Or did it? And Brown goofed up...?
Each person's perceptions are different, each person's criterion for describing something as warm/cold is different, this is why thermometers are used. It removes all the variation due to these types of subjective aspects.
Also, we have no description of where these touches were made on the two bodies, if Brown felt under a layer of clothing, and Phillips is not, for example, that would make a huge difference. But we don't know the important details, we do know that touch is not reliable where ever those touches were made though, we don't know the temperature of the air on the two occasions, so it doesn't matter why different people people report different things based upon touch. The variation between the situations is so large the entire ToD by touch estimations are not only unsafe, they are unreliable.
For three hours after death, doctors will pick up on the temperature from inside the body, recogninzing that it tapers away over time. A body does not go warm - warm - warm - warm - cold. It goes warm - a little less warm - even lesser warm - slightly cold - more cold - all cold. That is how a rough opinion can be formed by feeling for warmth. And Chapman was COLD.
I will not go to the lenghts of finding a case where somebody saying that a body was cold to the touch has convicted a criminal - but I am certain it has happened and is still happening. Once I work up the will to argue more with you, I will look it up, though. I am slightly tempered, just to show you. It may take some time, however. X-mas coming up, and all.
This is the simple truth as far as I am concerned: Phillips was unlikely in the extreme (I would say it is virtually impossible) to mistake a still warm body (as Chapman WOULD have been if she died at 5.30) for a totally cold one, but for that small warmth in the belly. And he apparently felt INSIDE the body too, so it is not just about skin warmth.
You are comparing pineapples to carrots here (itīs worse than apples and pears, they are more closely related), as far as Iīm concerned. If you want to look away from the obvious facts of the matter on account of a belief that three unreliable witnesses is enough to rule unreliability out, then do so. Personbally, I think three bad witness would take things in the other direction.
I am a hundred per cent sure that it is wrong to favour the witnesses in this case - but equally certain that people are free to make their own calls, whether I find them unrealistic or not.
So be my guest. You bring a lot of sense to the boards on numerous other matters, and I salute you for that. But in this particular case, my personal take is that you fail to understand the implications. Since you will certainly feel the same about me, all I can say is that it would have been better if you didnīt...

We know the variation in internal temperatures would produce a time window spanning hours, so even if the variation of this less reliable method were the same, rather than far larger (which would be the case), by estimating a ToD around 4:30, the margin of error for that estimate spans the time derived from the witness statements.
The medical testimony, once viewed objectively, does not contradict the witnesses.
- Jeff
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