How can I determine if my belief is justified and true according to the statement "my belief is a justified belief if and only if it is in fact a true belief"?

To determine if your belief is justified and true according to the statement "my belief is a justified belief if and only if it is in fact a true belief," you need to ensure that your belief is not only true but also supported by good reasons or evidence. Just because a belief is true does not necessarily mean it is justified. Justification requires evidence or reasoning to support the truth of the belief.