If we know that the only material in the area that could be used for making blowguns is bamboo, we are unlikely to specify that bamboo was used in the manufacture of a given blowgun, no matter how much our Lobjan teachers scream in frustration. That could make for an interesting plot: Tensions between Genetically Engineered Super-Brains who are always over-precise and pedantic and the average run of the mill Homo-Sap who can never finish.