In the famous grandmother's paradox, it says:

If you go back in time and kill your grandparents before your father was born, but this will create a paradoxical situation: if you go back in time and kill your young grandmother, and your grandmother died without a father, and without your father there would be no you, then who killed your grandmother?

Or take it as: Your presence means that your grandmother did not die because of you, so why did you kill your grandmother?

Tywin almost had this problem with the Time Turner, as he was unknowingly attacked by himself and severely injured.

Tywin, who had crossed back, apparently did not understand the intricacies of the relationship, and he only saw one of himself, coming at him, thinking that it was the attacker, so he raised his wand first.

However, that is actually the original self.

If Tywin was still alive, he would probably have to look up to the sky and ask, "Who killed me, and who did I kill?" ”

William sat in his office chair and continued to analyze the entire incident.

"After Tywin attacked 'himself', he went to the Ravenclaw common room to kill Robert and take the knocker.

At this time, he had already fought with 'himself' three times, and he was not lightly injured.

He drank the polyjuice potion he had prepared, took on the form of Professor Snape, and went to the medicine pantry. ”

"Why did he become Snape?" A headmaster in the frame asked.

William recognized it as the previous principal, Armando Dippert.

"Quite simply, Tywin had a fight with 'Snape' in the hallway on the fifth floor, and he didn't know it wasn't Snape, but that didn't stop him from thinking so.

Now that there was a fight, Snape was going to the Headmaster's office to find Professor Dumbledore, and the medicine pantry was empty.

So, he drank the polyjuice potion he had prepared and took Snape's form, intending to get some potions to heal his injuries, and then use this appearance to escape the school with the knocker.

But he didn't expect that Professor Snape was in the medicine pantry, and the two fought. ”

This was also the earliest memory William saw with Dumbledore.

Snape recalled that a man who looked exactly like him tried to break into the medicine pantry, and the two fought.

It's just that Tywin was badly injured and was no match for Snape, unexpectedly being hit in the chest by the Dark Magic and escaping again, while Snape rushed to Ravenclaw to check it out and found out that Robert was dead.

At this point, Tywin used the time turner for the third time, trying to stop himself from getting the ring in the first place.

But I never expected that I would be treated as Professor Snape by myself who had just left the Defense Against the Dark Arts office. ”

William stirred the meditation basin, revealing the fifth-floor hallway, where Tywin and Snape were fighting.

"This is the fifth time Tywin has been injured, and he finds himself stuck in a time loop, so he wants to go to the Room of Requirement and hide, but Lowe hides inside."

"That's the whole process of the professor, what's wrong with what I'm talking about?"

Dumbledore applauded, not only him, but also the headmasters in the frame.

The only one who didn't applaud was Phineas Black, who snorted out of his nose and called Tywin an idiot.

"William, you're better than I thought, I thought you wouldn't find out the connection in the end, and you'd come back to me, you deserve to be a Ravenclaw." Dumbledore applauded.

"No, I've been thinking about it for a long time, if it were you, you would find the problem at a glance." William said modestly.

"You exalt me too much, I am not omnipotent, and many people have wisdom that I do not have.

Thankfully, there were no outsiders here, and I hadn't blushed like I had since Professor McGonagall complimented me on my nobility. ”

"So Professor, I have a question."

"What?"

"If Tywin already has a time-turner, why would he be looking for a Ravenclaw ring for an ethereal legend?

Using the time turner directly, is it not the same as being able to travel back in time? ”

Dumbledore shook his head, "Do you really think so?" ”

"Isn't it?"

"I think you've read this phrase over and over again when you learned about the time turner, right?"

"No abuse!"

"That's right." Dumbledore crossed his hands and leaned back in his chair.

"According to the results of the current study, the maximum backtracking time that does not have a serious impact on the traveler or the time itself is about five hours, and the number of times each time period cannot be used is more than two.

All attempts to go back more than a few hours have had a disastrous effect on the witches and wizards involved.

For many years, it was not clear why time travelers could not survive a journey that spanned too much time.

However, these experiments were terminated in 1899, when Elois Mintab was trapped in 1402 for five days.

Her body had aged for five centuries on the way back, suffering irreparable wounds, and she died in St. Mungo's Hospital for Magical Injuries and Injuries shortly after she was rescued.

Similarly, the five days she spent in the distant past severely disrupted the life trajectories of everyone she met, and their lives were significantly affected, causing them to disappear and never be born in at least twenty-five of their current descendants. ”

"Finally, there were some dangerous signs, and in the days following Mrs. Mintab's return, time itself was disturbed as the rules of time were severely breached.

On the Tuesday after she reappeared, it lasted two days, while Thursday became four hours.

The Ministry of Magic has been troubled to cover up this matter, which has since led to the creation of the strictest legal regulations and penalties surrounding the study of time travel. ”

"Even under the management of the Ministry of Magic, the use of an extremely limited number of time converters is subject to hundreds of laws."

"While it's nowhere near as dangerous as traveling through five centuries, going back five hours can still lead to serious consequences.

As Saul Crocker put it, 'The human mind cannot understand time, and therefore cannot understand what kind of damage can be caused by trying to break the rules of time.' ’”

Listening to Dumbledore's words, William nodded.

Even if Tywin hadn't gone back five hours earlier, only in forty minutes, and he had only used the three time turners, he had almost caused him to kill himself.

If he used a time turner and went back ten years, more unpredictable things would happen, which is why he was looking for the Ravenclaw Ring!

After all, it is rumored that the Ravenclaw ring in time travel does not have any side effects.

It occurred to William that Tywin had used the time turner many times, and the first reason was because Dumbledore had gone to the Ravenclaw common room without warning.

This led to a series of avalanche-like accidents after Tywin!

It's scary to think about!

……

……

(The third update, ask for recommendation votes, big guys.) ）