Simplify the expression. 
Definitions:
Concrete Problems
Issues or challenges that are tangible and can be directly observed or physically dealt with, as opposed to abstract problems.
Hypothetical-Deductive Reasoning
The process of forming hypotheses and systematically testing them to solve problems or arrive at conclusions.
Metacognition
The awareness and understanding one has of their own thought processes, often referred to as "thinking about thinking."
Scientific Process
A methodological approach to research and discovery based on empirical and measurable evidence subject to specific principles of reasoning.
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