certainty in pleas and notices

The object of the rule is undoubtedly to enable the other party to make such answer or response to the matter set up in the plea or notice, either by way of pleading or of evidence, or such cross-examination of the witness of the party setting up the plea or notice as the facts of his case may enable him to do. In other words, to apprise him fairly of what he may expect to meet under the plea or notice.