Ключевые слова: brain, brainstorm, businessman, complexity, concept, conceptual, conscious, consciousness, copy space, empty, face, head, human, idea, imagination, inner, intelligence, intelligent, invention, male, man, memory, mental, mind, minded, open, pensive, people, perception, person, portrait, problem, question, reasoning, sign, smart, solution, solve, speech bubbles, symbol, technology, think, trouble, visualize, worried,