That isn't what deflationary means.
"Deflationary" just means that the number of monetary units grows slower than the economic activity it represents.
As with Bitcoin, have a static number of monetary units that represents increasing growth.
So in that case, how is "as possible" subjective?
When we cap the number of monetary units we lock the Supply side of the Supply/Demand equation.
The only way to make the situation MORE deflationary is to somehow artificially stimulate demand for money.
Which I suppose is possible, so maybe a Bitcoin standard *could be made more deflationary.
But the point is
a economic based on a fixed amount of monetary units creates the maximum deflationary condition.