Possibility enn paranjal mathralle nammal angane vere reethiyil varach nokan paadullu ...angane paranjirunnallo munpathe classukalil ....ivde possibility parayatha sthithikk ath concider cheyano..
In the basic diagram drawn, no bed is sofa is true, but the diagram can be draw in another way which in which no bed is sofa can be true. If it varies like that, then the conclusion will be false.