There is a passage that I cannot understand. It is from one of the LSAT prep tests.
Superconductors are substances that conduct electricity without resistance at low temperatures. Their use, however, will never be economically feasible, unless there is a substance that superconducts at a temperature above minus 148 Celsius. If there is such a substance, that substance must be an alloy of niobium and germanium. Unfortunately, such alloys superconduct at temperatures no higher than minus 160 degrees Celsius.
For me, a sentence "If there ... germanium." seems to be saying that an alloy of niobium and germanium can superconduct at a temperature higher than minus 148. However, the last sentence ("Unfortunately...Celsius") says that such alloys cannot superconduct at a temperature higher than minus 160, so for me it sounds like this whole passage does not make sense.
The passage says that there should be a material that superconduct at higher temperature than -148 for economic feasibility, and alloy of niobium and germanium is the only material that could satisfy this requirement. Then, suddenly it says that such alloy cannot superconduct at higher temperature than -160 (which is also higher than -148). What am I understanding wrong here?