Why not? Sounds like a valid objection that undermines your entire argument.
Further reading:
http://en.wikipedia.org/wiki/Falsifiability
http://en.wikipedia.org/wiki/Creative_destruction
http://en.wikipedia.org/wiki/Economic_calculation_problem
http://en.wikipedia.org/wiki/Spontaneous_order
Further reading:
http://en.wikipedia.org/wiki/Falsifiability
http://en.wikipedia.org/wiki/Creative_destruction
http://en.wikipedia.org/wiki/Economic_calculation_problem
http://en.wikipedia.org/wiki/Spontaneous_order