Consider the Wikipedia definition:
> In economics, inflation (or infrequently, price inflation) is a general rise in the price level of an economy over a period of time.
https://en.wikipedia.org/wiki/Inflation
What is "the price level of an economy?" How do you measure it? What factors are included and excluded? Why? Who decides?
Do we include real estate? Financial assets like stocks and bonds? Or do we stick to things like milk and eggs. Housing? Is that an asset or a consumable?
And this happens before we can really talk about what causes inflation to increase or decrease. The problem with most of the discussions of inflation I've read and seen is that each side has its own, often implicit, definition of inflation.