The terms in their hypothesese which are "is very likely" and "It is likely" means they really don't know. They're pulling these conclusions out of their collective arses. That's their way of saying "We're adding up all the evidence but we do not have enough evidence to say for sure".
They don't know, sir, or they would say they do know.
I think it's likely I'll have a hit record one day soon. The truth is, I don't really know if I ever will.
Same difference.
Oh, I have evidence that leads me believe it's likely. But until I sign a contract and see the sales hit the ceiling, I really don't know.
They don't know if we're causing global warming, either.
Don