add explanatory para

diff --git a/ztrans_proposal.mdwn b/ztrans_proposal.mdwn
index 11b9b86515a4a7288f311b94768f8a2baede6f30..f1763ae1c9fcab695f1d15bf588bf05800df5e6e 100644 (file)
--- a/ztrans_proposal.mdwn
+++ b/ztrans_proposal.mdwn
@@ -255,6 +255,11 @@ fused sequence replacing it) are required for other markets due to
 the higher accuracy obtainable at the lower range of input values when
 compared to LOG(1+P).
 
+(Thus we start to see why "proprietary" markets are excluded from this
+proposal, because "proprietary" markets would make *hardware*-driven
+optimisation decisions that would be completely inappropriate for a
+common standard).
+
 ATAN and ATAN2 is another example area in which one market's needs
 conflict directly with another: the only viable solution, without compromising
 one market to the detriment of the other, is to provide both opcodes