Superconductors are substances

Answer choices

1. A

   Correct64% picked this

   The use of superconductors will never be

   Why this is right

   The first and second ~ANG → ~M148 statements imply that ~M148 → ~EF substances that are not ∴ ~ANG → ~EF an alloy of niobium and germanium are not economically feasible superconductors. The first and third ANG → ~M148 statements imply that ~M148 → ~EF substances that are an ∴ ANG → ~EF alloy of niobium and germanium are not economically feasible superconductors.

   Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.

   64%
2. B

   Contradiction3% picked this

   If the alloys of niobium and germanium do not superconduct at temperatures above minus 148 degrees Celsius, then there are other

   The second and third ANG → ~M148 statements imply that no ~ANG → ~M148 substance [substances that are alloys of niobium and germanium and those that are not alloys of niobium and germanium] superconducts at temperatures above minus 148 degrees Celsius.

   3%
3. C

   Contradiction10% picked this

   The use of superconductors could be economically feasible if there is a substance that superconducts at temperatures below

   The statements imply that the use of superconductors will never be economically feasible.

   10%
4. D

   Contradiction10% picked this

   Alloys of niobium and germanium do not superconduct at temperatures below minus

   Such alloys superconduct at temperatures no higher than minus 160, so they must superconduct at temperatures below minus 148.

   10%
5. E

   Too Strong13% picked this

   No use of alloys of niobium and germanium will ever be

   This goes beyond using such alloys as superconductors. While such use will never be economically feasible, other uses of such alloys are beyond the scope of the statements and may be economically feasible.

   13%