Person A comes with research with evidence for (example) bus drivers in Denver is on their cell phone 60% more than in other places. They also are in 30% more crashes than in other places.
Conclusion: Bus drivers in Denver are bad drivers and crash more due to loving that cellphone!
Person B: Im a bus driver from Denver and never use my cellphone and never crash, therefore your research is invalid.
I realize this may be a horrid example :P Anyway, what is it called when person B dismisses scientific evidence from person A if person A comes with a general tendency, and the reasoning from person B is using a specific singular example as a counterargument.