Of course I don't believe them. But the criminal standard isn't "balance of evidence" it is "beyond a reasonable doubt" and I can't say that I have no doubt she's lying.
Eliminating Mens Rea would solve the problem. If they don't want to go to jail they can try being more competent, or, I expect, they can try not being crooks and what do you know all the crime they supposedly "weren't responsible for" magically stops. Huh.
In both US and UK immigration law isn't law. It's government edicts. Which means parliament chooses not to have a say and just leaves it 100% in the hands of the executive (Prime minister or president respectively).
Mens rea is beside the point, until the government violates other laws (and enough for famously reluctant to convict the government courts to take notice)
Eliminating Mens Rea would solve the problem. If they don't want to go to jail they can try being more competent, or, I expect, they can try not being crooks and what do you know all the crime they supposedly "weren't responsible for" magically stops. Huh.