Indirect speech - Wikipedia
https://en.wikipedia.org/wiki/Indirect_speechIn indirect speech, words generally have referents appropriate to the context in which the act of reporting takes place, rather than that in which the speech act being reported took place (or is conceived as taking place). The two acts often differ in a reference point (origo) – the point in time and place and the person speaking – and also in the person being addressed and the linguistic context. Thus when a sentence involves words or forms whose referents depend on th…