When you have to make a witness statement for court
independently provable facts: What you say against will be checked against facts and events which are provable independently of what you say.
You can bet that what you say in a witness statement will be checked against all other documentation available, some of which you may not have seen or even know about.
considering the overall probabilities of what you say: The more unreal and far-fetched your statement of fact, the better your evidence needs to be to prove it.
The test here is the balance of probabilities.
The balance of probabilities means that the court is satisfied an event occurred if the court considers that, on the evidence, the occurrence of the event was more likely than not.
Is it more likely that your story (or part of it) took place, or another person’s version of events on the evidence available? Or none of them?