How to Use "warrant" with Example Sentences

1. Does the risk of title disputes warrant the cost of title insurance ?
2. Holder said the review did not warrant any further investigation into the remaining 100-plus cases .
3. At that point , all those sick enough to warrant being treated would be under treatment .
4. We are completely responsible for this accident . We warrant we won 't make this kind of mistake again .
5. And the risk that ill-monitored russian nuclear material falls into the wrong hands seems real enough to warrant action .