- light verse: this is a short piece from the 70s, and is just about the idea that a computational defect may be a benefit. you shouldn't be so quick to decide that something - or somebody, as it may be - needs a fixing. maybe they're just fine as they are.

- segregationist: likewise, this is ultimately about self-acceptance, and has a very different undertone in that respect than most of asimov's work, and it's not clear that he's being critical of that different undertone, although the context of replacing a defective heart is also rather different than the context of accepting some idiosyncratic part of your individuality, so that is sort of a false comparison. you could interpret it as being a discourse surrounding the not-yet-existing transhumanist movement; he's certainly reaching for it, at least, in imagining a future where a senator has to choose between a bio-identical "plastic" heart and a mechanically functioning, metallic robot heart that would put him on the path towards transitioning from human to robot. but, as before, it may be more accurate to look at it from a then contemporary perspective (which, in this case, means 1967), and frame the discourse around racial mixing, instead. asimov presents both sides of the debate, so you can weigh the arguments he makes and decide for yourself. personally, i'll opt for betterment over stasis - although i'd suggest that, based on the arguments in the text, the plastic heart is the better option. in this hypothetical future of organ modularity, the ideal is frequent tune-ups, rather than permanent replacement.