Taking a look at the settings may help cure some obsessive-compulsive disorders.
Is Hermione Black?
No.
I can only say that "Harry Potter and the Cursed Child" is fanfiction, fanfiction! That book was not written by Rowling; the author is Jack Thorne, not Rowling. So don't use fanfiction settings to point at the original work and say: Actually, you are wrong.
Hogwarts Admissions Questions
Hogwarts' admissions have nothing to do with the Ministry of Magic. Hogwarts has the Book of Admittance and the Quill of Acceptance left by the four founders.
They record the names, dates of birth, and addresses of every magical child, used to determine who is eligible to attend Hogwarts. Every year, Professor McGonagallchecks the contents of the book and then sends acceptance letters to those children via owl.
Muggle and mudblood Questions:
Excerpt from an article:
"Muggle," Hagrid said, "is what we call people like them who don't believe in magic."
Also, in the United States, they are not called Muggles, but No-Maj.
"mudblood is a derogatory term for a person of Mugglebirth—that is, someone whose parents are not magical."
These are Rowling's definitions.
Therefore, please do not arbitrarily assign other interpretations to these two words. If anyone has other views on these two words, I suggest you discuss the topic with Rowling.
Galleon, Pound Sterling, and Salary Questions?
Galleon, also known as Gold Galleon, is the highest-value coin in wizarding currency, made of gold. One Galleon is equivalent to 17 sickles or 493 knuts. (All coins have Goblin magic and are unique; Galleons made with a Duplication Charm are worthless. [So, Wizards who want to use a Duplication Charm to replicate Galleons, please calm down, otherwise the Ministry of Magic won't mind sending you to Azkaban to cool off.])
In the late 20th century, a Galleon could be exchanged for 4.97 British Pounds or 10.17 US Dollars. (Why do many fanfictions say 5 British Pounds? That's actually approximately 5 British Pounds.)
British Pounds: (1990) Britain's average national income per month: 766 British Pounds (If you think this is too little, compare it to your country's 1990 salary.) Also, the values found by the author; if there are errors, please leave a comment to correct them for other readers to see. (Found via: www.shihang.org)
Wizarding World. Dobby: Dumbledore's offered price: ten Galleons a week, with weekends off (about 40 Galleons a month, approximately = 200 British Pounds).
Arthur Weasley's salary shouldn't be much higher than Dobby's. (Even if it's doubled or tripled.)
The salary of a Wizard in the Wizarding World is not equal to the salary of an ordinary person in Britain; the two are basically from two different worlds.
Relationship between Galleon and British Pound: Foreign exchange. (Author's own speculation.)
Gringotts stores some British Pounds, but not too many, so the idea of crashing Gringotts' currency market with British Pounds does not exist. (Just like you can't exchange half your red notes for US Dollars.)
You can convert British Pounds into Galleons through other means, such as gold and gemstones. (Remember, if you duplicate silver cutlery, the duplicated items' value is only their use value.) (Personal setting)
Durmstrang Institute is not in Russia; it is in Scandinavia. Russia has its own magic school called Koldovstoretz.
Why nine planets instead of eight: In 1990, Pluto had not yet been declassified.
Potter got rich by selling Sleekeazy's Hair Potion, the stuff Hermione used in her fourth year. (The company has already been sold, so he's living off his savings.)
The Potter family's Invisibility Cloak comes from the maternal side, meaning one of Potter's ancestors married the daughter or granddaughter of Ignotus Peverell, and the youngest of the three brothers had no son, so the family heirloom was brought into the Potterfamily, becoming the Potter family's heirloom. To some extent, Potter and Lord Voldemort are relatives, separated by centuries of kinship.
On the marauder's map: Lord Voldemort's name is displayed as Tom Riddle. Basically, few people know that Lord Voldemort's original name was Tom Riddle, so even if the Twins accidentally discovered it, they would only be curious about who this guy named Tom was.
Petrification and Basilisk: The Basilisk's gaze can cause death; anyone who is caught by its gaze will die instantly. The records do not indicate that the Basilisk's gaze causes petrification, which is why no one thought of the Basilisk.
Is it illegal to use magic in front of Muggle-born wizardsfamily members: Muggle-born wizards family members are allowed to know about the existence of the Wizarding World but are required to keep it secret. Underage Wizards using magic in front of family members is illegal because it violates the decree for the reasonable restriction of underage sorcery. Adult Wizards are not subject to this regulation; adult Wizards can use magic in front of their Muggle family members.