Answer:
unable to be taken away from or given away by the possessor. (Hope this helps)
Answer: It mostly depends on the situation.
Explanation: While with some topics such as accidents it's best to remember so as to not make the same mistake in the future and better yourself so it won't happen again. However, some situations which had benefited no one are sometimes just best left forgotten as there is nothing to be gained positively.
Whoever's trying to cook at the moment, I guess. People are inconsiderate and stand around like roadblocks. (Your question made no sense so my answer made none either.) Hope this helps pal.