Some mistakes are so obvious that a jury can find negligence as a matter of common knowledge. Missing the statute of limitations is a classic example of negligence that any layperson can understand. But when is expert testimony required? Here are six areas from a recent case:

• Failing to diligently investigate a claim.
• Failing to diligently prosecute a claim.
• Failing to challenge a class action certification.
• Failing to answer and respond to discovery.
• Failing to file a stay of counterclaims.
• Failing to file a motion for contempt.

Sprowl v. Dooley, No. 05-06-00359-CV, 2007 WL 1330447 (Tex. App.--Dallas May 8, 2007) (not designated for publication).