Answer:
This all depends on context, but in general:
Neutral: Generally having a middle ground opinion rather than being on an extreme side.
Positive: Usually refers to one's attitude, optimism. Can also mean certainty.
Negative: Not positive, could be referring to pessimism or seeing the bad side of things.
Walt Whitman was born May 31, 1819.
Carbon Dating, carbon dating is a from of dating in which you take the Fossil or bones of a animals and date it based on it's carbon decay.
