Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

[EX Q]: I want to know what the longest palindrome word is.
[EX A]: Detartrated. Edit: surprise, surprise, Wikipedia has more: The longest palindromic word in the Oxford English Dictionary is the onomatopoeic tattarrattat, coined by James Joyce in Ulysses (1922) for a knock on the door. The Guinness Book of Records gives the title to detartrated, the preterit and past participle of detartrate, a chemical term meaning to remove tartrates. Rotavator, a trademarked name for an agricultural machine, is often listed in dictionaries. The term redivider is used by some writers but appears to be an invented or derived termonly redivide and redivision appear in the Shorter Oxford Dictionary. Malayalam, an Indian language, is of equal length. So let's see: tattarrattat (onomatopoeic) detartrated Rotavator (trademark) redivider (disputed) Malayalam

[EX Q]: Example: The circular window was apparently made to match the shape of the sun. Here apparently expresses doubt, but with a certain level of conviction: that was the intent of the person who designed the window. Is there a word similar to apparently but with less level of conviction? Almost as if the conclusion were a rough guess? Or something that the speaker made up?.
[EX A]: Seemingly is what you're looking for. Seemingly vs. apparently Apparently: Is used when you have read or been told something, although you are not certain it is true. Apparently it's going to rain today. Is used when the situation is different than what you thought it was. You know I told you Alice's party was on the 13th? Well, I just saw her and it's apparently on the 14th. How do you like that? Seemingly: Appearing to be something, especially when this is not true. He remains confident and seemingly untroubled by his recent problems. According to the facts that you know. The factory closure is seemingly inevitable. (Quora)

[EX Q]: What do you call someone who knows all the gossip and stories about people in his neighborhood or surroundings, someone who's always informed. It doesn't have to be expressed in a word. Could be a sentence (e.g. she knows the ins and outs), but I'm looking for a better way to express it.
[EX A]:
You could descirbe them as being in the know. While this often refers to someone knowing confidential information, it can also extend to someone who is just generally well informed. Collins Dictionary If you are in the know about something, especially something that is not known about or understood by many people, you have information about it.