He wasn't in school.
He's in Conston; the Measurement of Truth confirmed that.
...But, it also confirmed that Sophie Asanami is not lying.
I thought that meant her information was wrong and she was only deemed as telling the truth because she genuinely thought she was telling the truth, but that also turned out to be incorrect.
No. Sophie's information―the information that 'Space is in the same school as us'―She definitely isn't lying about that. Right?
「Yes. The individual 'Sophie' is telling you what she knows as the truth」
Well, hold on, that's a little different. Just because she knows it as the truth doesn't mean it is the reality of the situation. What she believes is not necessarily correct, after all.
So, let me get this straight.
Space is currently in the Conston facility, but Sophie still counts as telling the truth when she says that Space is currently in our school because she believes she is telling me the truth, even if the information isn't actually correct.
