intuition
instinct / gut feeling / insight
[C/U] Both
pl: intuitions
This word describes a flash of insight that bypasses the step-by-step process of logic. It carries a sense of certainty that is felt rather than proven, often acting as a mental shortcut based on subconscious pattern recognition from past experiences. It is generally viewed as a positive or mysterious faculty, though in scientific contexts it is seen as a heuristic.
Uncountable when referring to the general faculty of instinctive knowing. Countable when referring to a specific instance of an intuitive flash or a particular hunch.