A person can get sunburned on a cloudy day.

The answer is true because even on a cloudy day, the sun's ultraviolet (UV) radiation can still penetrate through the clouds and reach the Earth's surface. Clouds can filter and scatter some of the UV rays, but not all of them. The amount of UV radiation may vary depending on the thickness and type of clouds. Also, people often underestimate the strength of the sun when it's cloudy and may not take necessary precautions like wearing sunscreen or protective clothing, leaving their skin exposed to the UV rays and increasing the risk of sunburn.