The answer to this question is Prototype.
This concept could take form in all field of technology. Prototype exist after several trial and error that being done in order to perfecting that concept. Companies or researchers usually use the prototype to in order to find a final glitch/bug in a certain concept before releasing to the masses.
Answer and Explanation
Introspection was Method by which trained observers carefully reflect and report on their mental experiences.
The fundamental problem with the introspectionist school of psychology was that the use of introspection as an experimental technique was often criticized because Introspection was limited in its use; complex subjects such as learning, personality, mental disorders, and development are difficult or even impossible to study with this technique and also different observers often provided significantly different responses to the exact same stimuli This was a bigger challenge to introspectionist school of psychology
Answer:
Largest planet in the solar system.
Explanation:
