Well, both biology and technology and the role scientists play. Is there a guideline of sorts in terms of what you're looking for?
BTW, now you're making me thinking of sick crossover of Edgeworth and Kanji... oh man... prosecutor finds alleyway thug beaten and unconscious on the street (from a lost fight against the shadows). Thug turns out to be suffering from amnesia. And, the whole crossover fic will revolve around the 2 months Kanji spent regaining his memory, and ends with him finally knowing what he needs to do and leaves. Both Edgeworth and Kanji return to the lives they had before they've ever met each other.
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BTW, now you're making me thinking of sick crossover of Edgeworth and Kanji... oh man... prosecutor finds alleyway thug beaten and unconscious on the street (from a lost fight against the shadows). Thug turns out to be suffering from amnesia. And, the whole crossover fic will revolve around the 2 months Kanji spent regaining his memory, and ends with him finally knowing what he needs to do and leaves. Both Edgeworth and Kanji return to the lives they had before they've ever met each other.