They check there answers using history, like they use primary sources etc.
Answer: Johannes Kepler
Explanation: Johannes Kepler (Weil der stadt, December 27th, 1571 - Regensburg, November 15th, 1630), a key figure in the scientific revolution, was a German astronomer and mathematician; known primarily for his laws on the movement of planets in their orbit around the sun. He was a collaborator of Tycho Brahe, whom he replaced as imperial mathematician of Rudolph II.
Answer:
“When all other rights are violated, the right to rebellion becomes indisputable,” said prominent political thinker Thomas Paine. US Declaration of Independence 1776 proclaims that if any form of state power becomes destructive, the people have the right to change or abolish it and establish a new state power, basing it on such principles and organizing its powers in the form which, in his opinion, will best ensure its safety and well-being.
Explanation:
They were worried about the government cause they believed it had become corrupt.