A major problem, however, was that their powers of observation were limited to their unaided senses ​ — a limitation that led many brilliant men, including Aristotle, astray.
فقد ظنوا مثلا ان الكواكب والنجوم تدور حول الارض ،‏ وهي فكرة اعتُبرت آنذاك حقيقة بديهية .‏