How Gerrad gets rid of the intruder:
In the play "If I were you," Gerrad gets rid of the intruder by using his wit and cleverness. When the intruder enters Gerrad's house, he pretends to be a doctor and convinces the intruder that he is mentally ill. Gerrad tells the intruder that he suffers from a condition called "reversal complex," where he believes he is the intruder and the intruder is actually Gerrad. Using this ruse, Gerrad successfully confuses and disorients the intruder, ultimately convincing him to leave the house.

The central idea of the play:
The central idea of the play "If I were you" revolves around the power of imagination and the ability to think on one's feet. The play explores the idea that with quick thinking and clever strategies, one can overcome difficult situations and outsmart their adversaries. Gerrad's ability to create a fictional scenario and convince the intruder of his supposed mental illness highlights the importance of wit and resourcefulness in challenging circumstances.

The play also touches upon the theme of identity and self-perception. Gerrad's act of reversing his own identity and projecting it onto the intruder reflects the idea that one's perception of oneself can be fluid and malleable. By pretending to be the intruder, Gerrad not only confuses the intruder but also questions the stability of his own identity.

Another theme present in the play is the idea of deception and its consequences. Gerrad's actions may be seen as deceitful, but they are driven by the need to protect himself and his property. The play raises ethical questions about the use of deception as a means of self-defense.

Overall, "If I were you" emphasizes the importance of quick thinking, imagination, and adaptability in navigating challenging situations. It prompts the audience to reflect on the power of the mind and the various ways in which one can confront and overcome adversity.