[Roscoe]

You have rights permission to use an office you lease, acquired by permission of the owner...

Denying that property rights are elements of leasehold estates?

Bizarre.

...who has the right to determine the disposition of his office since he owns it.

He only holds the rights he retains after encumbering his property with a lease.

Libertarianism is based upon profound ignorance of the nature of property.

[Alan Chapman]

He only holds the rights he retains after encumbering his property with a lease.

Ya, so? What does this have to do with the right of a property owner to determine the disposition of his own property? Obviously if he has leased his property to another the owner is obligated to fullfill his end of the contract.