Question:
Based on the premise "so the Serger is not a sewing machine itself it's something that goes with it", can we conclude that "Serger is an attachment, not a sewing machine itself."?
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Answer:
it is not possible to tell

Question:
Based on the premise "mail used by non-households to send and pay bills to other non-households).", can we conclude that "Mail used by non-households to pay bills to other non-households is a very effective method."?
****
Answer:
it is not possible to tell

Question:
Based on the premise "On the peninsula, the oldest human-related relics (10,000 b.c. ) are Stone Age tools of the Negritos.", can we conclude that "Stone Age tools of the Negritos were as old as 10,000 b.c. and considered oldest human relics."?
****
Answer:
yes