condition is true or false, give the function a name that ends in
@samp{p} (which stands for ``predicate''). If the name is one word,
add just @samp{p}; if the name is multiple words, add @samp{-p}.
-Examples are @code{framep} and @code{frame-live-p}. This predicate
-suffix should not be used in variable names (i.e., you should name a
-variable @code{foo-feature} instead of @code{foo-feature-p}).
+Examples are @code{framep} and @code{frame-live-p}. We recommend to
+avoid using this @code{-p} suffix in boolean variable names, unless
+the variable is bound to a predicate function; instead, use a
+@code{-flag} suffix or names like @code{is-foo}.
@item
If the purpose of a variable is to store a single function, give it a