You have learned that drawing conclusions involves subjectivity, although your goal is to remain objective. Even the most even-handed researchers bring their goals, background, and frame of reference to bear on the inferences they make. Consider the contentious issue of climate change. Most mainstream scientists now believe climate change to be real and induced by human activity. However, some scientists cast doubt on the extent to which global warming is human-made and constitutes an imminent threat. How can something objectively measurable be so contentious?