Anchor:  Now, if he could get a gang up the thousand miles to the sky with enough torches to melt the cracks, it might recongeal as a perfect sphere.
Entailed: A perfect sphere could be reconstructed if the cracks were melted. 
Contradiction: The sky had never been cracked from its spherical shape. 
Contradiction: They are operating on a Martian.
Contradiction: I started to protest, 'Wait, maybe you shouldn't just-'
Contradiction: The two people are sitting at a table.
Contradiction: We need to study the barriers that exist for screening people.