Human: Is it safe to drink a glass of water that has been sitting out for a while? Assistant: 
It is generally safe to drink a glass of water that has been sitting out for a few hours. However, there are some potential risks associated with drinking water that has been exposed to the air for too long. These include an increased risk of bacterial contamination and the potential for chlorine to dissipate from the water. If you have any concerns about the safety of the water, you should always check with your doctor or local health department before consuming it.