Acontrolled way of asking and answering unbiased questions about the world is called a(n):

Experimentation

Explanation:

Experimentation are practical activities carried out in a controlled way of asking and answering unbiased questions, support or refute a tentative answer (hypothesis). Experimentation is a process in scientific method  in which one or more variables are consciously manipulated and the effect of that manipulation on other variables is observed. The variable which is being manipulated by the researcher is said to be the independent variable while the dependent variable is the change in behavior measured by the researcher.

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