One scientific belief held by both rené descartes
and isaac newton is that
(1) reasoned thought is the way to discover truth
(2) new theories should be made to fit existing
traditional ideas
(3) the method by which discoveries are made is
unimportant
(4) difficult problems should be solved by reading
religious texts

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.