toto
Muse
- Joined
- Nov 4, 2002
- Messages
- 733
evidence is not about scientifc realities, .
Surely this is wrong?
evidence is not about scientifc realities, .
The Hellmann&Zanetti-appointed experts; not the 'independent' experts.
And, Hellmann & Zanetti are, by definition, no longer regarded as impartial.
Mach 1 seems to be posting more out of fear and desperation than with logic or information.
I find this reversal of the burden of proof and reasoning quite amusing. So "any DNA finding is itself contamination by definition", so from this point of view the finding of Meredith's DNA comes from contamination. The interesting part then is how the prosecution doesn't have to "provide an explanation about a mechanism that describes the event and document the probability of its occurrence". In other words, the prosecution doesn't have to show that this contamination event is related with the crime. We just have to assume that for some strange reason, when there are many other possible routes of contamination. It is the defense who must do the providing of the mechanism.
(..)
Thanks for all the great posts on the DNA, they've been really informative. I'm amazed at the anti-science posting - are the independent experts aware of how much they are being criticised by sources close to the prosecution? If not, someone should let them know
That is quite an odd infection analogy that you're using - and wouldn't be considered by any doctor or scientist. If you want a medical analogy, I would probably use infection control. Hospitals now have very strict infection control policies because we know that when it comes to transmitting infections 'anything is possible' - and if you're working with vulnerable patients (analogy with LCN DNA), the policies in place are far more extensive and have to be much more closely followed. If none of the basic standards of infection control are followed, you'll never be able to find out the exact source of an infection outbreak as anything can happen - and if it is possible for it happen, at some time it probably will.
If a vulnerable patient was subject to the infection control standards that were as shoddy as the standards used to collect the DNA, I might consider starting them on some broad spectrum antibiotics, regardless of whether they were showing acute signs of an infection
But I think you can see the oddity, the non-correspondence of this last example. In fact, the doctor / infection example points out exactly the difference between the example, and the proposing of a contamination scenario.
In fact, if the doctor commences an infection treatment, it means he has clinical evidence of infection. That is, it means precisely he has a proof that infection exists.
The detalis about the exact time and event, could be investigated or remain unknown, but the details are secondary insofar as the infection has been already proven, independently from this information.
A quite different thing it would be if the doctor had no evidence at all that any infection is ongoing or ever occurred.
In a case whete you may have have no clinical indicators, except, maybe, only the possible information about how the person got infected... Well, in that case, when you don't have anything but that information... with no information, you have no event.
In the Kercher DNA case (and in Sollecito's DNA on the clasp), the factual element is the finding of the DNA; if you don't have any contamination scenario that is credible, meaning you can explain this by offering a probable explanation based on a factual element (that is: information about a certain event that would itself cause that specific contamination event to be a very probable consequence of it), well if you don't have this you don't have anything to argue contamination. Even a child understands this. There is no need to ask a scientist about something that is elementary logic. "Everything is possible" cannot be an answer. There should be no need to argue this.
1. If you prove the contamination occurred, then proving the exact way in which it occurred, becomes irrelevant. If you did not prove the contamination, then you need to at least prove the mechanism.
2. The logical procedure, following the above statement, now is: a) make a list of the possible number of ways; b) assess whether among this ways there is one which is probable (and calculate the probability).
I find this reversal of the burden of proof and reasoning quite amusing. So "any DNA finding is itself contamination by definition", so from this point of view the finding of Meredith's DNA comes from contamination. The interesting part then is how the prosecution doesn't have to "provide an explanation about a mechanism that describes the event and document the probability of its occurrence". In other words, the prosecution doesn't have to show that this contamination event is related with the crime. We just have to assume that for some strange reason, when there are many other possible routes of contamination. It is the defense who must do the providing of the mechanism.
If the reasoning by Machiaveli is not a blatant reversal of the burden of proof I don't know what is.
That is quite an odd infection analogy that you're using - and wouldn't be considered by any doctor or scientist. If you want a medical analogy, I would probably use infection control. Hospitals now have very strict infection control policies because we know that when it comes to transmitting infections 'anything is possible' - and if you're working with vulnerable patients (analogy with LCN DNA), the policies in place are far more extensive and have to be much more closely followed. If none of the basic standards of infection control are followed, you'll never be able to find out the exact source of an infection outbreak as anything can happen - and if it is possible for it happen, at some time it probably will.
If a vulnerable patient was subject to the infection control standards that were as shoddy as the standards used to collect the DNA, I might consider starting them on some broad spectrum antibiotics, regardless of whether they were showing acute signs of an infection
But a vulnerable patient (a patien with reduced immunitary defence) is not a fitting comparison. Because, the point here is the rarity of the contaminating agent.
In general, a patient with low defense is exposed to infection, meaning a generic infection by some common agent.
But the patient is not going to be infected by on specific peculiar variant of the anthrax virus only possessd by a Russian military laboratory.
Here you are not talking about 'contamination' in general.
You are talking about how Sollecito's DNA could have contaminated a metal surface of a bra clasp inside Meredith's room, and how Kercher's DNA could have contaminated the blade of a knife that belongs to Sollecito's apartment.
Sollecito's DNA and Kercher's DNA are an extremly rare product. They are much more rare than polonium 210 and it's extremly difficult to have a transfer of a microscopic amount from one microscopic source (where was depositated in a microscopic amount) to another item (this would be 'tertiary' transfer, something that statistically just doesn't occur).
The theory is simply crazy from a statistic vewpoint.
What are the many other routes of contamination?
Mach is just playing games with words. If there is dirt on a shirt the shirt became dirty. If there is DNA on a shirt, the shirt is dirty. Therefore; DNA is dirt.
Also, Mach doesn't fully understand the difference between dirt and contamination. Or doing science properly and following Italian law.
My point is that if we assume his premisse "DNA is contamination", then it doesn't make sense that the defense must prove the mechanism whereas the prosecution doesn't as this reverses the burden of proof. If everything is contamination, by his own logic "the mechanism must be proven", then the prosecution must prove it, otherwise there was no contamination. His logic is self-contradictory and circular.
So Machiavelli, who did release the "bloody bathroom" picture? It wasn't the one taken by the Nikon that was in the case file. Here is the picture of him taking that photo with his little camera:
What's so rare about Meredith Kercher's DNA? 105 out of Stefanoni's 155 Egrams show Meredith Kercher's profile. Her DNA was all over the crime scene and the lab. If there was to be an instance of lab contamination, I would actually expect it to show Meredith Kercher's DNA.
For that matter, Sollecito's DNA is common enough in the evidence collection and certainly was to be found in the cottage. I think I can see it on the rubber gloves that were used to pick up the clasp.
You're kidding right?
I wasn't disagreeing with you.
Mach would say that the prosecution explained how the DNA contaminated the knife by saying it was used to kill Meredith.
He wants the defense to say exactly how it got on (contaminated) the knife.
The PGP believe that knife was used and they believe Amanda and Raf used it so they demand that they be convinced another route was more likely but since they are 100% sure there is no more likely way.
Now if the knife had been found, transported and tested properly (to international standards or probably Italian standards) I would agree with him. Even if they had sent the knife to another lab it would be better evidence. If the records showed proper negative controls that would be more convincing.
Of course if the knife fit the murder and the outline that too would be more convincing.
But a vulnerable patient (a patien with reduced immunitary defence) is not a fitting comparison. Because, the point here is the rarity of the contaminating agent.
In general, a patient with low defense is exposed to infection, meaning a generic infection by some common agent.
But the patient is not going to be infected by on specific peculiar variant of the anthrax virus only possessd by a Russian military laboratory.
Here you are not talking about 'contamination' in general.
You are talking about how Sollecito's DNA could have contaminated a metal surface of a bra clasp inside Meredith's room, and how Kercher's DNA could have contaminated the blade of a knife that belongs to Sollecito's apartment.
Sollecito's DNA and Kercher's DNA are an extremly rare product. They are much more rare than polonium 210 and it's extremly difficult to have a transfer of a microscopic amount from one microscopic source (where was depositated in a microscopic amount) to another item (this would be 'tertiary' transfer, something that statistically just doesn't occur).
The theory is simply crazy from a statistic vewpoint.
Mach's persistance is noteworthy and should be recognized but his opinions and objectivity needs upgrading, ASAP. Asking for routes of contamination? Really? Where was he when the whole world was watching and laughing at Stefanoni's sloppy work?
It's amazing how the Italian courts just can't let this one go. It really is. After what happened at the appeal (C&V report) there shouldn't be any, even brief, discussion about the knfie and the bra clasp.
What are the many other routes of contamination?
(are they probable?)