Lateral thinking is a kind of thinking that involves coming up with creative solutions to problems by looking at them from different angles. It is often used to solve complex problems that require unconventional solutions. Nonlinear thinking is a type of thinking that does not follow a linear path, but instead looks at the problem from multiple perspectives. WISHFUL thinking is a type of thinking that involves hoping for something to happen without taking any action to make it happen. All three types of thinking are important in problem solving and can be used together to come up with creative solutions.