What does corroborating sources allow a historian to do?

verify that the information is true

Explanation:

The historical sources are any testimony (written, oral, material) that allows the reconstruction, analysis and interpretation of historical events. Historical sources constitute the raw material of History.

The diversity of historical sources can be object of different classifications according to their origin, the support in which they are found, the topic they address or to which they refer, intentionality (if they have one), etc.

Because of their origin, historical sources are classified as primary or direct sources and secondary, indirect or historiographic sources.

The PRIMARY SOURCES come from the time that is being investigated. They are contemporary testimonies of the facts: laws, treaties, memories, population censuses, newspaper articles, images, objects of daily life ...

The SECONDARY SOURCES have been elaborated after the period under study and are the work of historians. Fundamentally they are the text books, the manuals, the scientific studies and articles of specialized magazines ... They are also secondary sources the graphs and thematic maps made with primary data.

b) that he was not a free man

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.