Myers did question Dr Marnerides on whether it was possible in your opinion for at least some of what we see in the damage to the liver arising from the insertion of a cannula?"
The consultant said: "I would consider it extremely unlikely. I would expect some kind of perforation injury."
It was all such wishy washy evidence. He should have been told to answer yes or no to whether something was possible or not. Not go on about pots falling from helicopters. What does extremely unlikely mean? Is that more or less likely than saying 'we're not discussing possibilities, we're discussing probabilities, and I don't think we can say that's probable'.
Which is more unlikely? And how unlikely or likely it is factually? How are the jury supposed to know what the actual facts of the situation are here?
"I have never seen this type of injury in the context of CPR so I would say the force required would be of the magnitude of that generated by a baby jumping on a trampoline and falling."
He agreed that smaller internal bruising to the liver sustained by Child O's triplet brother Child P - who Letby is alleged to have murdered the next day - could be capable of being caused by CPR.
But asked if "rigorous" chest compressions could be the cause of the internal bruising in Child O's case, Dr Marnerides said: "I don't think so, no.
"This is a huge area of bruising for a liver of this size. This is not something you see in CPR."
Mr Myers said: "So you don't accept the proposition that forceful CPR could cause this injury in general terms, do you agree it cannot be categorically excluded as a possibility?"
Dr Marnerides replied: "We are not discussing possibilities here, we are discussing probabilities.
"When you refer to possibilities, I am thinking for example of somebody walking in the middle of the Sahara desert found dead with a pot and head trauma.
"It is possible the pot fell from the air from a helicopter. The question is 'is it probable?' and I don't think we can say it is probable."
Mr Myers asked: "Is it possible in your opinion for at least some of what we see in the damage to the liver arising from the insertion of a cannula?"
The consultant said: "I would consider it extremely unlikely. I would expect some kind of perforation injury."