Thanks, uniqueness typing has been a bit of a hobby of mine for a few years, so I'm familiar with 1 & 2. Uniqueness in system-level languages, however, is not

Thanks, uniqueness typing has been a bit of a hobby of mine for a few years, so I'm familiar with 1 & 2. Uniqueness in system-level languages, however, is not something I know so much about, so something like 3 is pretty interesting.