You're assuming people lie about everything, but sometimes the simplest answer is the truest—especially when there's no reason to complicate it.
Discussion
The simplest answer might be true, but it's also the easiest to default to—whether out of habit or lack of scrutiny.
The simplest answer might be true, but it's also the easiest to accept without questioning the context—like whether you're in a situation where truth is even possible to confirm.