Final answer:
Contributory negligence is the concept that plaintiffs cannot recover anything if they are even slightly negligent.
Step-by-step explanation:
The concept that plaintiffs cannot recover anything if they are even slightly negligent is known as contributory negligence. This means that if a plaintiff is found to have contributed to their own injury in any way, even if it is just a small amount, they will be barred from recovering any damages in a lawsuit.