This summary is not the rule. The rule text controls.
Here's a plain English summary:
If you're suing someone (or making a claim against someone in a lawsuit), you don't have to limit yourself to just one issue. You can bring all the claims you have against that person in the same case, as long as they're against the same opposing party. This applies whether you're the one starting the lawsuit, filing a counterclaim, bringing in a cross-claim, or filing a third-party claim.
You can combine different types of claims too. For example, you could include a breach of contract claim and a personal injury claim against the same person in one lawsuit, even though these are different types of legal issues. You can also list claims as alternatives to each other, meaning you're not sure which one applies but you want the court to consider both options.
The point of this rule is to let people resolve all their disputes with someone in a single case instead of filing multiple separate lawsuits. This saves time and money for everyone involved, including the courts.
