On Thu, Nov 10, 2022 at 08:42:20AM +0100, Marc Nieper-Wißkirchen wrote: > PS Trying to find types of the following should also be done when > evaluating type systems: > > (vector 1 'foo '()) And, not to forget, what if you do (vector-set! x 1 "bar") later in the program. Cheers, Peter