Dictionary.com/trilemma

"the lead industries holding that the eps may not consider costs in setting NAAQS presents a *trilemma*"

trilemma

\Tri*lem"ma\, n. [NL., fr. Gr. ? (see Tri-) + {?} any thing received, in logic, an assumption. Cf. Dilemma.] 1. (Logic) A syllogism with three conditional propositions, the major premises of which are disjunctively affirmed in the minor. See Dilemma.

2. A state of things in which it is difficult to determine which one of three courses to pursue.