Well, when I just looked up "thus," the definition provided by the all-knowing Gooooooooooogle had "in this way" as the secondary definition, and "consequently/for that reason" as the primary, so I have decided, and consequently so it must be, that:
1) it depends on which dictionary you use
2) popular usage defines a language, and things fall in and out of fashion, rendering your grandma's rules archaic
3) transposing them is not the same as comprise/compose, because even MW has the third definition of THUS as "because of this or that: HENCE, CONSEQUENTLY" so :001_tt2:
However, I will defer to Queen Ellie and if she tells me I have to use Hence instead of Thus, I will.
#h in both