Scientists should definitely use evidence - and they collect this evidence though especially designed experiments. Based on their data and assumptions they build models which they then test, but they can base their conclusions based on the models too.
What they should not do is based the conclusions on opinions, because opinions are not imparcial- they can state them as opinions, but not as conclusions.
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<span>Therefore, Peter was demonstrating an "affect blend."
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Affect blend alludes to an outward appearance in which one part of the face is enrolling one feeling and another piece of the face is enlisting an alternate feeling. In short we can say that it is facial expressions uncovering at least two feelings at the same time.
Social norms or social expectations
How they made hunting spears and hunting for food.
