Avery had given Alice an extremely powerful artifact before they arrived. That item could bypass most lie detection spells and protect her mind from memory inspection.
Isaac did have similar items, given to him by Avery, but they were not strong enough to guarantee safety against the powerful lie detection skills that would be used on them soon.
His only powerful item concealed recent memories.
That was all. Still, he was confident about lie detection test after Avery confirmed what kind of questions would be asked.
Avery had asked him multiple times why he was confident. Isaac never gave a full explanation.
Even Alice didn't know. Whenever she tried to ask, Isaac simply changed the topic.
Just as she was about to question him again, someone knocked on the tent's wooden door.
"Time," a soldier said from outside.
Isaac stood.
"Let's go."
They were escorted to the main command area of the camp. Once they arrived, the guards separated them.
Alice was led toward one tent.
