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shminux comments on The Limits of Intelligence and Me: Domain Expertise - Less Wrong
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Comments (78)
Can't say I agree that numbers are like physical representation of maps, but that would be a discussion for another day.
I do not agree that this is an accurate map. Consider a random collection of dots: human eye can find patterns in it. Chances are, what we think of as physical laws are just the patterns we distill from the utter randomness.
Not enough to compress it substantially.
Random collection of dots:
Not a random collection of dots:
ETA: Well, those links weren't working, then they were working, currently they aren't. The actual URLs are http://kennaway.org.uk/images/noise.jpg and http://kennaway.org.uk/images/notnoise.jpg
ETA2: And now they're working, or not, at random.
Your web server is giving a 403 Forbidden response to requests that include a referer, which includes (in most web browsers) requests for images in <img> elements. This can probably be configured somewhere on your web server. You may currently have something like this enabled and you'll need to disable it.
(A reason someone might want this behavior is to prevent hotlinking, but in this case, you want to hotlink your own image.)
The reason that the behavior is intermittent is presumably caching on your browser. When I tested it from the command line the behavior seemed quite consistent.
That is probably it. It doesn't explain the direct links failing though.
I blame browser caching. In the process of testing I made several dozen requests without a Referer and all of them were 200 OK (and in the case of a couple dozen of those I double-checked that the file contents were identical with each other).
Edit: Actually, you can test this if your Apache install is set to log Referers to your access log (this is a common default). If so, you'll probably find that the 403 lines have Referers and the 200 lines don't. (You may also see some 304 Not Modified responses there, which would probably be either all without Referers or maybe a mixture.)
Well, clicking on the links and then reloading doesn't work.
It doesn’t work if you just click the link, but if you copy the link address and paste it in a browser then it works. (Because there isn’t a referrer header anymore.)
Not working for me. Try imagebin or something. Also note that the compression can be very lossy. The real test is how well one can extrapolate from a small patch outward.
The issue isn't where they're stored. The explicit links I gave work, but they work only intermittently from within Markdown. If I load the permalink for my comment they don't show. But if I open the two explicit links in separate windows, then reload the permalink, the Markdown links work.
The explicit links weren't working for me.
If I click on the links it just says "Forbidden". Perhaps they work for you because you have access permissions that we don't?
The site doesn't know who I am when I access them. They work for me from anywhere. Is there anyone else they do work for?