Case 1: Wool is cut from a dead sheep without attached impure tissue; it is pure under the Hanafi principle.
Case 2: Hair is plucked with moist impure tissue remaining at the root, triggering a separate impurity issue.
Case 3: The ruling on a bone from carrion differs among the Hanafi, Shafi‘i and Maliki schools; the word “carrion” alone does not settle the disagreement.