A: Good science comes from well-defined research questions that arrive at objective facts, while opinions are beliefs or feelings that cannot be proven through the scientific method. However, as humans, researchers can have biases because of past experiences, assumptions, and goals. To minimize the effects of human bias, scientific research needs to be well-designed, which can involve double blinding (where neither researchers nor participants know who received experimental treatment) and randomization (the chance assignment of intervention or placebo). It is important to note, however, that the media can present biased interpretations of scientific facts and outcomes. Thus, it is helpful to read the scientific literature itself, known as the primary source.