General:
* Evidence: This is the most common and direct noun. It refers to the proof or facts that make something clear.
* Clarity: This noun emphasizes the ease of understanding something.
* Certainty: This emphasizes that something is definitely true.
More specific:
* Manifestation: This suggests something that is clearly visible or obvious.
* Demonstration: This implies something that is shown or proven.
* Proof: This emphasizes the irrefutable nature of the evidence.
The best noun will depend on the specific situation. For example:
* "The evidence suggests that the suspect was at the scene of the crime."
* "The clarity of her explanation made it easy to understand."
* "There is no certainty about the future."
You could also use a phrase like "the fact that it is evident" or "the evidence of its evident nature."