Certain Biblical paragraphs are stated in a Theme-Development form. In other words a broad general idea is stated first followed by the development of this broad general theme in specific details. The Theme-Detail form creates a unified paragraph. The style rule requires that we interpret the general theme with special focus on the attributes of the illustrative detail selected. Today's example illustrates this as shown below.

BIblical verses Ex01-08:10 form a Biblical paragraph with a theme-detail structure:
• Theme: And there arose up a new king over Egypt, who did not appreciate Joseph
• Detail: And he said to his people, Behold, the people of the children of Israel are more and mightier than we; Come, let us outsmart them lest they multiply and join our enemies in time of war and banish us.

Rashi comments: The two sentences form one paragraph. That is the statement in the theme sentence who did not know Joseph refers to the details mentioned in the second sentence outsmart them lest they multiply and join our enemies in time of war and banish us. In other words the King certainly knew who Joseph was and what Joseph had done for the Egyptian people. But the King no longer trusted Joseph despite his former record. The King was suspicious of the Jews.

Advanced Rashi: The Hebrew Yud-Daleth-Ayin equally means know and appreciate. For example when Joseph's brothers were talking in Hebrew about the sale of Joseph the verse says they didn't appreciate that Joseph was listening Gn42-23. They obviously knew he was listening but they didn't think he understood; in other words, although they cognitively knew he was listening they didn't fully appreciate it. By translating the Hebrew word Yud-Daleth-Ayin as appreciate we emphasize that although Pharoh knew that Joseph during famine fought for the Egyptian people and cared about them he no longer appreciated this fact. Rather, he treated Joseph like a stranger, someone he didn't know. Joseph and the Jews might multiply and might join an enemy in time of war and banish the Egyptians. Hence Pharoh had to make the first strike and outsmart the Jews.

To recap: The statement Pharoh didn't know/appreciate Joseph could be interpreted on many levels. The general-detail structure restricts the interpretation to the detail phrase: He didn't appreciate his kindness and acted suspiciously to him.

On a very deep level this Rashi and verse portends to a very current theme - the relation between population growth and food growth. The classical argument is that if people and food continue to grow as is there will be wars because of lack of food resources. But Joseph refuted this. During the years of famine there was adequate food because they gathered food during the good years! So too - if the Jews were multiplying Joseph with his ingenuity could produce enough food for all. The argument of the religious people who continue to reproduce is that with faith we find the means to produce adequate food. Joseph had proven that faith works. But Pharoh acted in a conventional conservative manner and no longer appreciated Joseph's faith and his devotion and abilty to provide food and prevent famines.