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Fill in the square of opposition

Exercise and reference answers

Missing parts
  1. Answer
    contraries
    Choices
    1. contraries
    2. contradictories
  2. Answer
    sub-contraries
    Choices
    1. subalterns
    2. sub-contraries
Complete the statement
A and E are {0}: both can be false, but never both true. I and O are {1}: both can be true, but never both false.
Instructions
Tap the word that belongs in each blank.

Explanation

_Source: Carveth Read, Logic: Deductive and Inductive (1914, public domain), Chapter VII, Immediate Inferences, section 6 Contrariety_
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