There are three <span>rules of inference are used in the sentence.</span>
<span>1) </span><span>Universal Instantiation, if x is a man, then x is not
an island” and “If Manhattan is a man, then Manhattan is</span> not an island.”
<span>2) </span>Contrapositive,
If Manhattan is an island, then Manhattan is not a man.”
3) Applying
modus ponens or modus tollens. We derive the result that Manhattan is not a man.
Observing behavior in real-world settings and making no effort to manipulate or control the situation is known as naturalistic observation. It is a research method that is most used by psychologists which they observe their test subjects in thir natural habitat without changing any parameter.
Answer: 3
Explanation: I’m sorry I don’t know 2 but 3 is Peasants 90% of people worked as them.
Trade was controlled by Britain because it had such a large navy that other European countries could not compete with.