 Uncertainty types label | type | description | example ---| ---| ---| --- E | Epistemic | The proposition is possible, but its truth-value cannot be decided at the moment. | She **may** be already asleep. I | Investigation | The proposition is in the process of having its truth-value determined. | She **examined** the role of NF-kappaB in protein activation. D | Doxatic | The proposition expresses beliefs and hypotheses, which may be known as true or false by others. | She **believes** that the Earth is flat. N | Condition | The proposition is true or false based on the truth-value of another proposition. | **If** she gets the job, she will move to Utrecht. C | *certain* | *n/a* | *n/a*  