This summary is not the rule. The rule text controls.
When someone raises certain early objections in a lawsuit, called declinatory or dilatory exceptions, sometimes the reason for the objection isn't obvious just from looking at the paperwork already filed. This rule explains what happens in that situation.
If the objection deals with things like whether the court has the right kind of authority over the case (a declinatory exception), and the reason for that objection isn't clear from the petition, the citation, or the paperwork showing how the other side was notified, then both sides can bring in evidence. This means they can present documents, testimony, or other proof to back up or challenge the objection.
The same idea applies to dilatory exceptions, which usually involve procedural problems like improper venue or unclear claims. If the reason for this type of objection isn't obvious just from reading the petition, the parties can also introduce evidence at the hearing to explain their side.
Basically, this rule makes sure that when the paperwork alone doesn't tell the whole story, people get a chance to prove their point with real evidence instead of just arguing based on what's written in the initial court documents.