However, these desiderata seemingly form an inconsistent triad, and thus a trilemma. The "Epicurean trilemma" however was already raised by Epicurus. This is known as trilemma or impossible trinity. Relying on economic theory, this is what Zambernardi labels the "impossible trilemma" of counterinsurgency. Armenia was ranked 43rd among 125 countries at Energy Trilemma Index in 2018. There is no getting out of this trilemma. In 2003, philosopher Nick Bostrom proposed a trilemma that he called "the simulation argument". As early as 2005, Bono was invoking this argument, identified as the "Lewis trilemma". The title is taken from James Robinson Graves' "The Trilemma". In tackling the energy trilemma, saving energy is the cheapest of all measures. This problem is best seen as a trilemma. The logical soundness of this trilemma has been widely questioned. This trilemma rounds off the classical problem of justification in the theory of knowledge.