a.Many students have argued so/thus.
b.The colleges have expanded, thus/so allowing many more people the chance of higher education.
c.We do not own the building. So/ Thus, it would be impossible for us to make any major changes to it.
d.She thinks I dislike her but that just isn’t so/thus.
. So and thus are interchangeable in a, b and c. But I have my own preference in sentences a and b: a.Many students have argued so.
b.The colleges have expanded, thus allowing many more people the chance of higher education.
Sentence d can use onlyso because it is used as an adjective meaning true.