Well objective cases only affect personal pronouns so the statement is true.
Answer:
We tend to make assumptions about others based on their appearance, their economic status, their characteristics, and their experiences. For example, if someone conducts themselves in an authoritative way, one might make the assumption that they are confident. This is assuming that they are one way, when in actuality, they may be another. In general, as a society, making assumptions is quite common. If a person can afford luxurious items, I might make the assumption that they are wealthy. However, we can also make assumptions about the issues we face in our lives. For instance, if an individual is struggling to obtain a well-paying job, they may make the assumption that others are to blame for their hardships. Ultimately, assumptions are made to simplify our understanding of things.
I hope this helps! :)
