Which type of knot creates Torah liability on Shabbat?
The Rambam defines three tiers: permanent + professional = Torah liability. Semi-permanent or non-professional = rabbinic prohibition. Temporary = permitted.
Question 2
Are loops considered knots for Shabbat purposes?
Loops are explicitly permitted — they're not knots. You can make a loop freely on Shabbat.
Question 3
What makes "makeh b'patish" unique among the 39 melachot?
Makeh b'patish is about completion — the final creative act that gives an item its finished, usable form. It applies far beyond actual hammering.
Question 4
Can you trap dangerous creatures (snakes, scorpions) on Shabbat?
Dangerous creatures are an exception: you may trap snakes, scorpions, and similar creatures to prevent injury, even on Shabbat.
Question 5
Demolishing on Shabbat — when does it create Torah liability?
Demolishing is only Torah-liable when done constructively — with intent to rebuild. Purposeless destruction is rabbinically forbidden but not a Torah violation.