Even when no GPL v2/3 code is quoted by Copilot, is using the code for training a non-free product allowed under the license? Under the license, is Copilot therefore now licensed GPL v2/3? The GPL code was certainly used to create a critical, integral part of Copilot, and to create its output.
If I understand correctly, GPL v2/3 were designed to prevent non-free products from being parasites on FOSS code, taking and not giving. If that's the spirit of GPL, Copilot seems to clearly violate it.