Especially since it's unclear.
Most economists consider negative inflation a catastrophe, because of a "deflation spiral" -- prices go down, vendors and manufactures make less money, lay people off, they have less money to spend, so prices go down, etc.
(All other things being equal, of course, which they never really are.)
Most, but slightly fewer, consider low (0-2%) inflation to be sub-optimal, but not catastrophic. A little inflation nudges people to buy stuff (including investments) rather than stuffing their money in a mattress, which it slows the economy down.
About 2% is considered optimal. There are those who would like it lower.
Above 2% is considered a problem, and getting into catastrophic range somewhere on the order of 4-5%, depending on a whole lotta factors.
That's conventional wisdom among economists, but definitely not "I'm surprised you don't know that much" territory. Especially without that crucial distinction between negative and low inflation. 1% inflation simply is not a catastrophe.