 For example, Darwin’s perception of psychological continuity between species is an example of a theory-laden commitment that shapes how the data is perceived. Among today’s scientists, there is a diversity of views about continuity and discontinuity. Some scientists may be described as “romantic” because they take animals and humans to share many psychological properties the way Darwin described it. Other scientists may be described as “killjoy” because they deny many human capacities to animals. This terminology, first used by Daniel Dennett (1983), and criticized by Sara Shettleworth (2010b), highlights an example of a theory-laden approach to science. Attempts to avoid working from one of these two perspectives are attempts to find objectivity, which as we will see admits of its own challenges.