what is a word for telling someone to do something and then tell them something different ? e.g sit up no sit down ,?

Actually we dont try to understand what is the main difference between love and life.Whose we should need to give first priority.hence some time i think about it and try to find out the real theme of this statement.

On the basis of our society it means that life is nothing without LOVE and On the basis of Politics purposes Love is nothing if the LIFE going dash to the ground.

Short answer: There are extremely few major practical advancements or inventions that were not achieved with experimentation (experience). Check with Edison or Tesla or Jobs or . . .

Longer answer: There is a fallacy in logic which is when you argue something to be untrue when its truth is confirmed. You may have valid logical premises to argue, for example, that there is no zebra in your living room, but it is fallacious to make that argument when you see the zebra in your living room.

You have the same affect with experience. If truthful experience has proven that condition A can exist, then logical argument against that possibility goes out the window. All other things being equal, experience provides more intelligence than logic. Experience (confirmed truth) fills in where logic fails due to ignorance or misinformation.

Bear in mind, I'm a big fan of logic appropriately applied. But you asked me to choose one.

what does it mean when forrester warns jamal that "bitterly disappointed teachers are either very effective or very dangerous"'?