Such volcanoes are devastating, but very rare. The last one happened at Toba in Sumatra, Indonesia, 74,000 years ago. The active volcanic system at Yellowstone National Park has resulted in super-eruptions-the most recent happened 640,000 years ago. Yellowstone's volcanism is powered by magma rising from a hotspot.
A biased opinion is based on a preconceived notion or idea about a thing, person or group of people based on personal beliefs. In psychology, a bias is known as a cognitive shortcut.. It is based on the idea that the human brain, in order to conserve energy, naturally looks for shorter paths to conclusions by using what has been ingrained to draw speedy conclusions.
2 Synonyms found for biased. biased 1610s in reference to bowling, 1660s in reference to persons; pp. adj. from bias (q.v.). In the selection of these she was biased by her personal feelings, but to a degree far less than was to be anticipated. On literary subjects they are often full of over-statement and of biased judgment. How much their opinions were biased by the fact that they were descendants of the firstborn son, we can not say. They were biased, unreliable at best, as regards culinary matters.