I'll refer you to a quote by what I consider the smartest President among the founders.

“If the American people ever allow private banks to control the issue of their currency, first by inflation, then by deflation, the banks and corporations that will grow up around [the banks] will deprive the people of all property until their children wake-up homeless on the continent their fathers conquered. The issuing power should be taken from the banks and restored to the people, to whom it properly belongs.” “I sincerely believe that banking establishments are more dangerous than standing armies, and that the principle of spending money to be paid by posterity under the name of funding is but swindling futurity on a large scale.” –Thomas Jefferson to John Taylor, 1816.

So yes, in my opinion you can have deflation. Will it be a good thing for the average American? It probably will be as far as every day goods go, but it won't be for the price of large ticket items like homes and vehicles. Everyone would immediately be upside down on their loans with no possibility of ever selling the properties. If we got into that scenario some form of debt relief or forgiveness would be in order.