Some people say Inspiration is caused when a particle so small they penetrate us imperceptibly strikes a minute cluster of neurons in the brain, an entirely random and unpredictable event.
Others describe a
Collective Subconscious that we can all tap into and share within our dreams & daydreams, we pour our experiences & thoughts into it, mix it up, and the lucky ones get the resulting spark, maybe even around the same time like Newton & Leibniz.
Or some things are simply
emergent and they're going to happen regardless, sit back and enjoy.
Is there a fourth option?