The Tesla "FSD" computer is actually "dual redundant" as mentioned in this
Tesla Autonomy Day clip from 3 years ago:
https://youtu.be/Ucp0TTmvqOE?t=4648 However to your point, 2 is not enough;
it's only enough to tell you *someone* is wrong, but not who. Hence why in
my job with hardware testing we need a minimum of 3 devices tested to
indicate which one is the outlier, if any. Given that "FSD" even now is
still a level 2 system where the driver is fully responsible for the
actions of the car, I suppose they don't care, if one computer doesn't
agree with the other, it kicks back to you, the responsible driver. Very
annoying and dangerous if this happens around a sharp turn or construction
zone, as (non-FSD) autopilot tends to do, however.

- Justin


> Message: 4
> Date: Wed, 10 Aug 2022 21:44:09 -0400
> From: "mark hanson" <markehans...@gmail.com>
> To: "'Electric Vehicle Discussion List'" <ev@lists.evdl.org>
> Subject: [EVDL] Self Driving Not Ready for Prime Time, EVLN: Tesla
>         can't see kids
> Message-ID: <000b01d8ad23$d9e84c50$8db8e4f0$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi Folks,
>
>
>
> I was heading up rt81 freeway from Roanoke VA to Harrisonburg yesterday in
> my Tesla Y to get flushed away at the Massanutten H20 Park and an hour into
> the trip the self driving or "auto pilot" jerked the steering wheel into
> the
> left lane & I jerked it back (luckily between cars).  I thought using self
> driving was safe on straight highways, "what could possibly go wrong?".
> Then about a 1/2 hour later (just using the cruise control), it hit the
> brakes and I hit the accelerator (almost got rear ended).  My son said
> "dad,
> why don't you just drive the car and forget about the self driving
> nonsense".  Words of wisdom.  Elon should just keep making a nice EV and
> forget the fluffy stuff that causes problems.
>
>
>
> The fundemantal "fatal flaw" is self driving needs at least 3 computers to
> "vote" and kick out the one that gets a glitch (cosmic rays, brain farts
> etc).  All the cars attempting this foolishness are using only *one*
> microcomputer.
>
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