--- freem/doc/freem_conformance.1	2025/05/05 04:48:17	1.4
+++ freem/doc/freem_conformance.1	2025/05/05 23:18:29	1.5
@@ -1,5 +1,5 @@
 .\"
-.\"   $Id: freem_conformance.1,v 1.4 2025/05/05 04:48:17 snw Exp $
+.\"   $Id: freem_conformance.1,v 1.5 2025/05/05 23:18:29 snw Exp $
 .\"
 .\"   Author: Serena Willis <snw@coherent-logic.com>
 .\"    Copyright (C) 2025 Coherent Logic Development LLC
@@ -20,6 +20,9 @@
 .\"   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
 .\"
 .\"   $Log: freem_conformance.1,v $
+.\"   Revision 1.5  2025/05/05 23:18:29  snw
+.\"   Update conformance document to cover the idiotic numeric coercion rules around E notation
+.\"
 .\"   Revision 1.4  2025/05/05 04:48:17  snw
 .\"   Update conformance document
 .\"
@@ -265,6 +268,18 @@ Miscellaneous Language Features
 .\}
 \fB$DIALECT\fR intrinsic special variable
 .RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
+Multiple consecutive pluses or minuses after the E in E notation are allowed. The fact that they are illegal in numlits but string coercion is expected to ignore the signs makes it impossible to fix, because the MDC couldn't find a sensible set of numeric coercion rules with two hands and a flashlight.
+.RE
+
 .RE
 
 .SH SUPPORTED CHARACTER SET PROFILES