Four general rules were stated by R. Yishmael in the name of R. Meir in respect to damages. Wherever the mazik ("the damager") has permission (to be), but not the nizak ("the damaged"), he (the mazik) is not liable. Wherever the nizak has permission, but not the mazik, he (the mazik) is liable for everything. Where neither the nizak nor the mazik have permission (to be), such as property which belongs to neither of them, he (the mazik) is liable for (damage of) "tooth" and "foot," and, for the rest, mued pays full damages, and tam, half damages. Wherever both have permission (to be), such as property owned in common, open land, the public domain, and the like, for "tooth" and "foot" he is not liable and, for the rest, mued pays full damages, and tam, half damages.