Answer:
Historians are very careful when drawing conclusions, and this is why they try to use different sources.
Explanation:
For example, an historian studying Ancient Egyptian civilization would use written records, archeological evidence, and secondary sources.
Written records or primary sources serve to get a first hand account of the civilization, however, they are often scarce or unreliable.
Archeological evidence serves to give an account of the material life of the cilivilization, but it does not necessarily provide information about intangible things such as religion, ideology, or culture.
Finally, secondary sources can work as a benchmark, or even a textbook, to which the historian will compare and contrast his conclusions.
