Now that is without question some of the best double talk I have seen in a long while. A 99 year lease is "just" a temporary thing.
So I guess, to insure precision, there is NOTHING permanent. PERIOD. No USA, no human race, no orb wandering around the Universe.
But in our REAL WORLD, 99 year leases in US Pentagon Speak are considered permanent bases. At least when I was doing BRAC work, bases where we had long term leases were listed as Permanent. So SOMEONE at the DoD disagrees with your assessment.
Double-talk is conflating permanence with impermanence, as you once again attempt.
Let's be clear: Permanence is contingent upon existence. In the case of 2 countries, it is based on the states' continued existence. If either party ceases to exist then the agreement ceases to exist. 99 year leases, whether between private parties or states, are not permanent -- they have an agreed-upon end. At that time they can be renegotiated or not. Also, if both parties agree then the agreement itself could be renegotiated at any time and a new agreement come into force.
Think of the Philippines:
Until November 1992, pursuant to the 1947 Military Bases Agreement, the United States maintained and operated major facilities at Clark Air Base, Subic Bay Naval Complex, and several small subsidiary installations in the Philippines. In August 1991, negotiators from the two countries reached agreement on a draft treaty providing for use of Subic Bay Naval Base by U.S. forces for 10 years. The draft treaty did not include use of Clark Air Base, which had been so heavily damaged by the 1991 eruption of Mount Pinatubo that the U.S. decided to abandon it.
In September 1991, the Philippine Senate rejected the bases treaty, and despite further efforts to salvage the situation, the two sides could not reach an agreement. As a result, the Philippine Government informed the U.S. on December 6, 1991, that it would have one year to complete withdrawal. That withdrawal went smoothly and was completed ahead of schedule, with the last U.S. forces departing on November 24, 1992. On departure, the U.S. Government turned over assets worth more than $1.3 billion to the Philippines, including an airport and ship-repair facility. Agencies formed by the Philippine Government have converted the former military bases for civilian commercial use, with Subic Bay serving as a flagship for that effort.