I think this is a reason the name. Although cast steel is also produced by pig iron, but cast steel has lower content of carbon element. So, scientifically speaking, if the carbon content is upper 2%, then it should be called as cast iron, but if lower than 2%, then it should be called as cast steel.
Depending on the type of dementia, the person's behavior may eventually become out of control. The person may become angry, agitated, and combative or clingy and childlike. He or she may wander and become lost. These problems can make it difficult for family members or others to continue providing care at home.
Dementia is awful. It forces you to mourn for someone who's still actively living and breathing. And the really tough thing about dementia is that it comes and goes. An elderly person with dementia doesn't have a constant reality; their reality -- which they themselves are incapable of tracking -- is ever-shifting.