"I have other evidence!"
[Show it!]
[Right, if you have evidence, bring it out, we can also give you some advice.]
"My graduation project was filed with the school, and my advisor also has a record of it, so I have evidence when it comes to the timeline. If that's not enough, I also have photos I took during my freshman year as proof!"
"During my freshman year, I worked at a café, and the boss, knowing I could draw, let me doodle on the small blackboard every day."
"I once drew a couple holding hands on the café's small blackboard. It was Valentine's Day, and I dressed the couple in matching outfits, the Flower of the Other Shore sweaters."
"I have photos from that time, and many couples visited the café and took photos together. I can ask the vast number of netizens to dig up photos from four years ago!"
[What he's saying is logical, it doesn't quite sound like he's lying.]