“nachvollziehen” works for “tracing” a line of arguing for example. So someone gives you their train of thought that led to a conclusion and you “follow” that. You don’t necessarily agree, but you understand how they got there. “vorstellen” is more for imagining stuff (things, events, situations). There is an overlap though and sometimes you can use “vorstellen” instead of “nachvollziehen”. But I’d say don’t do it the other way around.
Is “das kann ich nachvollziehen” the same as saying “das kann ich mir vorstellen”? Or what is the difference?
“nachvollziehen” works for “tracing” a line of arguing for example. So someone gives you their train of thought that led to a conclusion and you “follow” that. You don’t necessarily agree, but you understand how they got there.
“vorstellen” is more for imagining stuff (things, events, situations).
There is an overlap though and sometimes you can use “vorstellen” instead of “nachvollziehen”. But I’d say don’t do it the other way around.