Anarchy is not a viable economic system.

The military, diplomacy and political power relation with external entities has nothing to do with the capacity of an economy to be enough strong to be viable.

Bug-free software is possible

The halting problem only concern arbitrary program, it doesn't show anything about the interesting to have program.
1 supporter.

Bug-free software is possible

Even the formal verified programs are without bug as long as the specification is complete, and specification is hard if possible to be complete
1 supporter.

Anarchy is not a viable economic system.

Several anarchic movement (Spanish Revolution of 1936, Makhno movement in Ukraine, the start of russian revolution of 1917) was quite economical successful in the past. The reason why they failed was mainly military reasons.