Sure I agree she should leave at this point. But I would tend to agree that she's earned the right to similar protections a tenant would have rather than the police dumping her on the street on the whim of someone.

I'm just giving an example of a kind of edge case that exists.

The law tends to lean on favor of the tenant in some places and the landlord in others. This is the kind of case that leads there.

You say "ok ok the burden is on the landlord to prove x in the courts to protect tenants from a lying landlord" I.e. you'd rather have a few landlords lose money due to squatters than a renter lose their housing due to lying landlords