On Fri, 30 Jan 2026 00:43:51 -0000 (UTC), Ben Blaney <benblaney@gmail.invalid> wrote:
Instead of wasting my brain on this, I asked ChatGPT.
Hmm
I go to the 19 min answer immediately, as I guess most do
I then used Mike Fleming's reasonsing to think - "what is the nature
of a flashlight? - it projects lights" - so then had Ari stand in the
middle of the bridge shining a light for each person, and so
eliminating the return trips, which gets you to 17. But apparently
that's not allowed :-)
I didn't get to the insight that you need to send Cal and Don
together, to wrap Don's time in with Cal's, saving 5 mins.
<gritted teeth>
Well done ChatGPT
<swerve to other thread>
But as none of us think ChatGPT is a reasoning engine, how did it get
the answer? Is not the most likely way that, trained on millions of
internet pages, it already knew it somewhere, and just regurgitated
it? In which case "I asked ChatGPT" becomes "I asked the internet"?
I pasted the problem exactly as stated by Mark into a search engine,
and found dozens of hits, including Wikipedia. So ChatGPT didn't
*solve* the problem, it just searched for the answer and formatted it
nicely for you.
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