Discover and read the best of Twitter Threads about #smokealarm

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So not so much a #ContactTracing app as a feature-creeping Christmas tree?

One thing about tech that's successful is that it is ultimately successful because it performs the core function it (cl)aims to provide well.

In case you're wondering, "Detection rate" refers to detecting other #phones with the app installed, not the #virus:

The #FalseNegative rate is the amount of times the app incorrectly reports a contact as 'non-infectious' when in fact it is / could be...
...and the #FalsePositive rate is how often the app incorrectly reports a contact as 'infectious' when it's not, i.e. a #FalseAlarm.

Basically, what these #ErrorRates tell us is that #Bluetooth ranging is HARD!

Would you trust a #SmokeAlarm that went off wrongly nearly half...
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