I thought we already covered that.
http://www.japantimes.co.jp/opinion...y/japan-commentary/the-truth-about-deflation/
This explains the stagnation part.
For the big crashes google any of the asset bubbles form in the past.
Then hyperinflation for why it is a stupid idea to cheapen money in difficult times.
For bonus points you could look at the over indebtedness we currently have.
The only way you could counter this form a keynes point of view is to argue we can outgrow it. Then I would like to remind you that inflation decrease spending power and our economy or the world economy is not keeping up. You need to simulate the economy a lot more with cheap money.