It's true. I am a terrible liar. And yet I had half the cast of the last production I was in convinced that one of the other actors was my brother for a portion of the time. So perhaps I am so unbelievable I am believable? No, I just bullshit too often.
So when someone thought I had given them a gift, but I knew nothing about it except that it was similar to another gift I had given to someone else, would they believe me when I say that it wasn't me? I'm not sure. But whoever gave it to him, he liked it, just putting it out there.