quick idea
thinking seriously
Improvising
sudden, unexpected, rapid, surprising, quick, rash, curt, brief, short
Intelligent, Clever, Bright, Sharp, Gifted, Observant, Alert or "Brainy", "On the Ball"
The synonym for "incentive" that is most associated with logical thinking is "rationale." Rationale refers to the reasoning or logical basis behind an action or decision, often highlighting the incentives that motivate specific choices. It emphasizes a clear, reasoned approach to understanding why certain actions are taken.
agile or quick-thinking
quick, speedy, at once
A synonym for "very fast" is quick.
pondering, reckoning, comprehending come to mind for me
fast; quick
Improvising
thinking seriously
remembrance; thinking about the past
Quick Rapid Hasty
fast, quick, speedy, rapid, ...
avant-garde
Visionary, progressive, planning, anticipating.