Is there any rule to understand when a shot is an "unforced error" or a "winner" in a objective meaning?
The tennis statistics at the end of a set always show the number of winners and unforced errors of the players. But when does a point count as a winner and when as unforced error?
Insert issue with arrays How to test randomness (case in point - Shuffling) First off, this question is ripped out from  question. I did it because I think this part is bigger than a sub-part of a longer question. If it offends, please pardon me.  Assume that you have a algorithm that generates randomness. Now how do you test it? Or to be more direct - Assume you have an algorithm that shuffles a deck of cards, how do you test that it's a perfectly random algorithm?  To add some theory to the problem - A deck of cards can be shuffled in 52! (52 factorial) different ways. Take a deck of cards, shuffle it by hand and write down the order of all cards. What is the probability that you would have gotten exactly that shuffle? Answer: 1 / 52!.  What is the chance that you, after shuffling, will get A, K, Q, J ... of each suit in a sequence? Answer 1 / 52!  So, just shuffling once and looking at the result will give you absolutely no information about your shuffling algorithms randomness. Twice and you have more information, Three even more...  How would you black box test a shuffling algorithm for randomness? Cartesian Product of Two Countable Sets is Countable Global variables in AngularJS What are the limitations on the Shape Water cantrip? I have been having a discussion regarding the Shape Water cantrip from the Elemental Evil Player's Companion. A friend and I are trying to come to an accurate view of how this spell actually functions.   Some example questions:   Must the targeted water be within a 5 foot cube area, or does it need to be of a volume not exceeding 125 cubic feet? If you shape water that is within a 5 foot cube, can the final shape you animate it to extend outside the cube? Can you cause the shaping to affect ice and snow, or only liquid water? Would you be able to carry a globe of water alongside you over distances?   Really, there are two parts:    What can be targeted by the spell? What are the limitations on the 'shape and animate' portion of the spell?   The answer I am looking for, if possible, would use the language of the spell, possibly with precedent from other game text, to clearly define the limitations of this cantrip. sum of double precision gives weird results I have 14" 16:9 notebook and would like my Windows 10 taskbar have on the (left) side. Unfortunately, although I set it to small icons the bar is pretty wide. Do not you know how to make it thinner?  This is how I would like to have it: Does the Planck scale imply that spacetime is discrete? Inverse function of $x^x$ How can I find the inverse function of $f(x) = x^x$? I cannot seem to find the inverse of this function, or any function in which there is both an $x$ in the exponent as well as the base. I have tried using logs, differentiating, etc, etc, but to no avail. I didn't like the skill I chosen for the first follower I found. Is it possible to respec his skill later on? inequality with three variables and condition Understanding downside of triple-leveraged ETF What happens to the price of the triple-leveraged ETF if the S&amp;P 500 loses more than one-third of its value (i.e., the return is below -33 1/3%)?  Does it mean the value is equal to zero? Running ERDAS Imagine and ArcGIS Desktop on same machine? Cannot suggest retag-only edit because "edits must be at least 6 characters" I was trying to suggest a retag of  on Seasoned Advice, but the system won't let me; I get the familiar message     Edits must be at least 6 characters; is there something else to improve in this post?   In general, that's not true for retagging; if you don't change the question body at all, it should work. I suspect the logic checking the edit is thrown off guard because of the title warning:     The question you're asking appears subjective and is likely to be closed       I found , but I cannot find any evidence (in SEDE) for invisible characters being present in the question's source. Also, that's supposed to be . Is there a word that describes a person who dies on his/her birthdate? What is the format for e-mail headers that display a name rather than the e-mail? $(xy + 1)(yz + 1)(zx + 1) $ is a perfect square if and only if each factor is crisscross, dillydally, riffraff, etc What happens to a bounty question if it gets migrated? clearly belongs elsewhere, but the asker already put a bounty on the question.  If the question is migrated, does the rep get refunded? Does the question continue to be a bounty question on the target site if the user has enough rep? (The asker in the referenced question does not have any associated accounts, but I'm curious about what happens.)  Edit: I just tried to add my own close vote, but apparently you can't when there's an open bounty. However, a mod should still be able to close/migrate/etc. Does a shortcode with a single attribute have to use an array?