Metaphysical dilemma of how to reach a conclusion

"As an isolated system, thought is doomed to the perpetual "yes, but," that arises out of not being able to know what you don't know.Without a circuit breaker,indecision and inaction would rule the day. What is needed is a mental switch that stops infinite ruminations and calms our fears of missing an unknown superior alternative. Such a switch can't be a thought or we would be back at the same problem. The simplest solution would be a sensation that feels like a thought but isn't subject to thought's perpetual self-questioning. The constellation of mental states that consti­tutes the feeling of knowing is a marvelous adaptation that solves a very real metaphysical dilemma of how to reach a conclusion."