> y193.9e1 is 1939 with decade precision, the 9 in 1939 is "estimated"
Still need more clarification. Are you saying
(a) "193.9e1" is commonly understood to mean the 9 in 1939 is "estimated"
(b) "y193.9e1" is proposed to mean that.
(c) or both.
If (a), I don't see what there is in that expression that denotes
estimation. I would read 193.9e1 to mean 1939 (exactly).
> Why the estimate? There are loads of reasons..
I don't question the usefulness of this, I question the syntax. If you are
saying (a) above, then it's news to me, that's not how I learned it, but I
will defer to your expertise, and in that case I am fine with this change.
If on the other hand that's not what you mean, than I am not comfortable
with the proposed syntax.