A modern author who wishes to indicate special emphasis to each item in a list uses bullets to indicate this emphasis. By bulleting the reader is asked to dwell for a moment on each list item and listen to its nuances. In my article Biblical Formatting to appear in the Jewish Bible Quarterly I have explained that when the Biblical Author wishes to indicate special emphasis on each member of a list, repeated keywords are used. The repeated keywords should be interpreted as the equivalent of a bulleted format. The following example illustrates this.

Verse Gn37-23a discussing the hatred of Joseph's brothers towards him states And it came to pass, when Joseph came to his brothers, that they stripped Joseph
• of his coat,
• of his multi-colored striped coat that was on him;

Rashi commenting on the bulleted structure indicated by the repeated underlined connective keyword, of states
• They stripped Joseph of his special multi-colored striped coat
• They also stripped Joseph of his ordinary clothes.

Sermonic points: Here Rashi interprets the bulleted list, indicated by the repeated underlined keyword, of, as emphasizing that both his special coat and his ordindary clothes were removed. Rashi does not go further as to what happened or why.

I would conjecture that Joseph's first dream, the farm bundle standing was interpreted spiritually by Joseph but physically by some of his brothers such as Shimon. These brothers did not see any prophetic spiritual content in Joseph's dreams. Hence they stripped him to get him to admit to the physical interpretation of the dream.

Because of the degradation Joseph suffered he was sold as a slave. And because he was sold as a slave the entire Jewish people were enslaved. Slavery is simply an emphasis on the physical and de-emphasis on the spiritual. The Jews were redeemed when they admitted and recognized spiritual prophecy. Hence we can see the Egyptian exile as a punishment for denying the prophetic nature of Joseph's dreams. There are in fact later authorities (Acharonim) who interpret the Egyptian slavery experience as a punishment for the treatment of Joseph.

We could also further this point by interpreting God's requirement to Abraham, that the Jews live in a strange land for 400 years as a logical statement that if Abraham wanted to be father of a prophetic people then eventually some people would interpret these prophecies physically and as a consequence these people would be punished with the Egyptian exile until such time that they would beg God for the redemption of prophecy.

We have only sketched the ideas above. Although the ideas are speculative they are consistent with the emphasis of Rashi that Joseph was totally stripped. It would seem there was serious argument between Joseph and some of his brothers whether dreams are prophetic or physical and as a punishment for the degradation that Joseph received, the Jews were enslaved for 400 years.

Finally, this verse nicely illustrates the potential in even small and superficially minor Rashis to evoke serious philosophical discussion.