Check the roots to see if they look mushy. If they are, the yellow is from the plant dying from rotting roots and it's best to cut off the dead part. They should reroot easily. Every couple of weeks, change the water.
A fallacy is a misleading argument or belief based on a falsehood. If you oppose state testing in schools, you think it is a fallacy that educational quality can be measured by standardized tests. Fallacy comes from the Latin fallacia, for deceit. It technically means a flaw in an argument that makes it deceptive or misleading. In poetry, the pathetic fallacy is the false idea that things like rocks or stars have human feelings (pathos). Fallacy can also be used more generally for any false statement or idea.
moderate - being within reasonable or average limits; not excessive or extreme; moderate prices; a moderate income; a moderate fine; moderate demands; a moderate estimate; a moderate eater; moderate success; a kitchen of moderate size; the X-ray showed moderate enlargement of the heart.