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Hello jumblr.
This is a revival of the ask-jumblr blog (@ask-jumblr) under different management. Check out the guidelines for asks under the cut.
Please remember pirkei avos 1:6: עשה לך רב. People on tumblr are not your rav. A lot of them aren't even Jewish (yet). Beware of halachic advice from strangers.
Newly-added FAQ under the cut. Read it to see if your question has already been answered. If it's there, your ask might not be posted.
For fundamental questions about Judaism check websites such as myjewishlearning.com and jewfaq.org. There's also the /r/Judaism wiki with treasure troves of information.
For "Am I Jewish" questions, please follow this flowchart. Only if that doesn't answer your question, may you ask here.