Assume Taleb's argument correct and replace  by Swiss Franc (CHF). Conclude that CHF/USD must be 0.

Now, get the swiss view and consider the USD/CHF pair. Conclude that USD/CHF=0.

1= (USD/CHF).(CHF/USD) = 0.0=0

Taleb's Theorem: 0=1

Sure...his argument can't go wrong!