Final answer:
Assigning a probability to a statement does not require knowledge of whether the statement is true. In probability theory, probabilities can be assigned to both true and false statements based on the degree of belief or confidence in their truth.
Step-by-step explanation:
Assigning a probability to a statement does not require knowledge of whether the statement is true. In probability theory, probabilities can be assigned to both true and false statements. The probability assigned to a statement reflects the degree of belief or confidence in its truth.
For example, if we are unsure whether it will rain tomorrow, we can assign a probability to the statement 'It will rain tomorrow,' even though we do not know if it is true or not. We can assign a higher probability if there are dark clouds and a lower probability if the weather has been sunny for days.
Therefore, not knowing whether X is true does not prevent us from assigning a probability to it.