On Tue, 15 Sep 2020 12:25:43 -0400, micky wrote:

If they have covid and they never know it but they give it to you, the
app won't help...

Aerosols and surfaces are irrelevant to the app.

Exactly my point.

FACT:
a. The facts are that the uptake isn't anywhere near what's needed
b. And even so, the apps miss asymptomatics, aerosol & surface exposure

ASSESSMENT:
c. Based on those facts, the apps can't possibly work in the western world.
d. And, based on other facts, they end up doing more harm than good.

You're welcome to disagree with my assessment of the facts
(people are funny that way); but logical adults can't disagree
with the facts (facts are funny that way).
--
Adults don't disagree on assessments until they agree on the facts.