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Regulations covering scientific experiments on human subjects are strict. Subjects must give their informed, written consent, and experimenters must submit their proposed experiments to thorough examination by overseeing bodies. Scientists who experiment on themselves can, functionally if not legally, avoid the restrictions ① associated with experimenting on other people. They can also sidestep most of the ethical issues involved: nobody, presumably, is more aware of an experiment’s potential hazards than the scientist who devised ② it. Nonetheless, experimenting on oneself remains ③ deeply problematic. One obvious drawback is the danger involved; knowing that it exists ④ does nothing to reduce it. A less obvious drawback is the limited range of data that the experiment can generate. Human anatomy and physiology vary, in small but significant ways, according to gender, age, lifestyle, and other factors. Experimental results derived from a single subject are, therefore, of limited value; there is no way to know ⑤ what the subject’s responses are typical or atypical of the response of humans as a group.

Choosing similar friends can have a rationale. Assessing the survivability of an environment can be risky (if an environment turns out to be deadly, for instance, it might be too late by the time you found out), so humans have evolved the desire to associate with similar individuals as a way to perform this function efficiently. This is especially useful to a species that lives in so many different sorts of environments. However, the carrying capacity of a given environment . If resources are very limited, the individuals who live in a particular place cannot all do the exact same thing (for example, if there are few trees, people cannot all live in tree houses, or if mangoes are in short supply, people cannot all live solely on a diet of mangoes). A rational strategy would therefore sometimes be to avoid similar members of one’s species.

(A) Thus, she may prescribe the behavior to them by uttering the norm statement in a prescriptive manner. Alternately, she may communicate that conformity is desired in other ways, such as by gesturing. In addition, she may threaten to sanction them for not behaving as she wishes. This will cause some to conform to her wishes and act as she acts.

(B) But some others will not need to have the behavior prescribed to them. They will observe the regularity of behavior and decide on their own that they ought to conform. They may do so for either rational or moral reasons.

(C) Others may then conform to this behavior for a number of reasons. The person who performed the initial action may think that others ought to behave as she behaves in situations of this sort. [3점]

By their very nature, the concepts of maintenance and repair are predominantly examined from a process-oriented perspective. ( ① ) The focus in related scholarly discourse often revolves around the lifespan or lifecycle of objects and technologies. ( ② ) In this context, maintenance and repair are considered practices that have the potential to prolong the existence of objects, ensuring their sustained utilization over an extended period. ( ③ ) Krebs and Weber critically engage with anthropomorphic metaphors that imply a biography of things, appropriately highlighting that conventional understanding of the lifecycle of a technology, from its acquisition to its disposal from the household, provides an incomplete definition. ( ④ ) Additionally, objects may enter recycling or second-hand cycles, leading to a dynamic afterlife marked by diverse applications. ( ⑤ ) As such, the life of an object exhibits a far more complicated and adaptive path than a simplistic linear progression.