A defect of title or undisclosed liability would invalidate the sale at any time.
But we unite in holding that these exceptions do not invalidate the assertion of our real unity in our common witness to the Gospel of the Grace of God."
They do not invalidate routes or ARP entries based on failures.
Something else to keep in mind is that you'll certainly invalidate your original warranty.
This prevents any kind of leading questions that could invalidate such a blind test.