Public opinion can never be any sounder than when it is based on ideas facts proposals hypothesis estimates

Facts.

The facts are situations that have occurred, correctly ascertained and confirmed. This means that a fact is something that does not depend on ideology or opinion, it is only a confirmed situation that is independent of the will of public opinion.

In the age of fake news, the information needs to be supported by facts and not by proposals, ideas or hypotheses. The media has the ability to shape public opinion and must confine itself to the facts in order to disclose exactly what has actually happened and not to infer.

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i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.