High clouds, such as cirrus, are composed of ice crystals and are thin enough to allow most solar radiation to pass through to the surface, while also reflecting some. They also trap outgoing infrared radiation, leading to a warming effect. Low clouds, like stratus, are denser and are very effective at reflecting incoming solar radiation, causing a cooling effect. They also absorb and re-emit infrared radiation from the Earth, contributing to a warming effect. Therefore, both statements contain inaccuracies regarding the primary effects.