Thanks to both Aaron and David, The quote that David found is the one that I am looking for.
> On 2 Jan 2020, at 08:38, David Young <[email protected]> wrote: > > > * All items can be the actual parameters of functions > * All items can be returned as results of functions > * All items can be the subject of assignment statements > * All items can be tested for equality. I am convinced I read this in the context of 'a bill of rights' for data items. I wonder if I am confusing articles from my dimly remembered past now. Steve
