This was revisited in item #286 in the 5th ballot, and
we voted to revert the previous decision.

The argument was that the distinction between
real? and real-valued? is impossible to keep track
of for a novice, which was a strong enough argument
to allow the revote.

-- 
Alex


On Wed, Dec 12, 2012 at 11:09 AM, Mark H Weaver <[email protected]> wrote:

> On the third ballot[1], #117 (Real numbers have imaginary part #e0)
> resulted in a strong 6:2 win for "exact-only", and this decision was
> implemented in R7RS-draft-3, and carried forward in drafts 4-6.
>
> However, this change was reverted in R7RS-draft-7.  The ticket[2] states
> "This decision was reversed because it created a silent incompatibility
> with R5RS", but the compatibility issues were obviously known to the WG
> at the time of the third ballot (three out of five rationales explicitly
> mentioned compatibility), and yet "exact-only" still won 6 out of 8
> votes.
>
> How can such a strong win for "exact-only" be reversed by the editors,
> and why wasn't this reversal brought up on the mailing list?
>
>       Mark
>
> [1] http://trac.sacrideo.us/wg/wiki/WG1Ballot3Results#WG1-Numerics
> [2] http://trac.sacrideo.us/wg/ticket/117
>
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>
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