raisingErrorsInTurn
fun Sequence<Solve.Response>.raisingErrorsInTurn(request: Solve.Request<ExecutionContext>): Sequence<Solve.Response>
The answers of a primitive, an error raised computing one of them becoming an answer raising it (arg2p): the engine computes an answer ahead (to know whether the call leaves alternatives), but the error is only raised if the resolution backtracks into it, as an error of that answer