Why did written language take so long to developed

Because of the housing bubble, many houses are now selling for much less than their selling price just two to three years ago. there is evidence that homeowners with virtually identical houses tend to ask for more if they paid more for the house. what fallacy are they making?

When the communist, under mao, took control of china in 1949 they announced total support support for which country and its ideology?

What is one property that water and oil do not share