itaibn

Security hole: This could leak hash preimages that the user has in cache but are sensitive.

Solution: Using a sha256="..." attribute should only allow you to access files that were initially loaded with a tag that has a sha256 attribute, and this attribute is only used for resources the developer considers public.

"do these waves behave like ripples in water, so a single event generates multiple repetitive, concentric waves permeating through space?"

No they don't. There is a law known as [Huygens' principle](https://en.wikipedia.org/wiki/Huygens%E2%80%93Fresnel_princi...) which says that when a disturbance at a particular point creates a wave, that wave only propagates on an outwards-expanding sphere that is centered at that point of disturbance, and does not produce any effect on the interior of that sphere. This was originally formulated for light waves, but it also holds for other kinds of waves, such as sound waves or, in this case, gravitational waves. What this means is that when you look at something that's far away you see a sharp image of exactly what happened there a short time ago (the time it had taken the light to reach you), whereas if the principle did not hold, each light source would have a small "echo" after it which would blur the image.

However, one of the reasons Huygens' principle holds is that the waves are propagating over three dimensions. In contrast, water waves only propagate over two dimensions, so Huygens' principle fails. That is why ripples continue to emanate from a spot even long after the disturbance there is over. More generally, Huygens' principle holds whenever the number of dimensions is odd and fails whenever the number of dimensions is even.

[Note: I may be wrong on why Huygens' principle fails for water waves. Water waves are actually pretty complicated compared to other kinds of waves and I am not knowledgeable in all the subtleties.]

I disagree. If philh intended to make the finer distinction you're now making they should have stated it. As it stands they are stating both that a) "science fiction" is a fuzzy category, there's no right or wrong in how you categorize it in specific instances and b) this particular statement on what is science fiction is right. These two points contradict each other, and dragonwriter was correct in pointing this out. Just because a certain usage of a word is not accepted by the majority doesn't mean it's wrong.

And gender-neutral singular "they" is steadily growing more popular!

You say that as if that makes remembering things easier.

The list seems to be missing the simplest naughty string of all: The empty string!

(Well, the text file has empty lines separating the comments and example strings so it technically includes the empty string, but it's not in the JSON file.)

I created my account and log in through Tor and don't experience any problems. I don't think I ever logged in outside of Tor, but I don't consider it to be a security requirement and am not sensitive about it, so it's possible there are exception (in particular it's that I misremember creating the account through Tor).

Further subtleties:

* The number may have optional sign and digits after a decimal point, and may use exponential notation. Example: (-1.2e1, .0E+0, 1.e-3) => "Yes". As seen in the second and third number here, there may be no digits before or after the decimal point, but both at the same time (i.e., ".0" and "0." parse but not ".").

* If the number begins with "0x" or "0X" it is read in hexadecimal, where the digits a-f may be in either case. Hexadecimal notation must not be accompanied by decimal point, sign, or exponential notation.

* No whitespace is permitted within the numeral, even between the sign and the digits as in "+ 11", but both tabs and spaces may be used before and after the numeral without changing its value. In particular, by using a input of the form "1 " it is possible to make rectangular display empty while still parsing it as number. Note that pressing "Check" leads to the numbers being displayed in the rectangle in exactly the same way as they were displayed in the text box, which may depend on the position of the cursor in the text box.

ETA: Also, you mentioned rounding, but there is also exponent overflow and underflow. The application refuses to parse numbers greater or equal to 1.7976932e308. It parses arbitrary negative exponents fine, but it does not recognize that 1e-324 is greater than 0.

If Bernard knew that Albert's first comment was impossible, then by the principle of explosion his first statement is correct according to his premises. Therefore his seond statement saying that his first statement is a lie would be incorrect.