"Robert Bonomi" wrote in message

Which leads the issue of 'false positives' -- those cases where the thing
triggers off for some reason _other_ than a human body-part in contact
with
the blade. This is an issue that *NOBODY*KNOWS* how likely it is to
occur.
It is impossible to predict what might happen in 'uncontrolled
environments
that could trigger the safety device.

Sorry Robert, but that's not a valid reason not to buy it. You're basing
your argument on the lack of evidence as a reason not to consider buying it.
That thinking is a basic fallacy of logical argument. It is understandable
however, that you might be uneasy about it because it is a new product and
not yet time tested.