v3 Chapter 18： Back in time

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The corner of the hallway disappeared, and Tom could feel himself flying backwards at a rapid rate, and everything around him was a mosaic of shapes and colors. The flight speed was very fast, and his eardrums were a little swollen—

Fortunately, this feeling only lasted for a short time, Tom's feet touched the solid ground, and everything became clear again. Tom and Hermione were standing in front of a portrait next to the stairs leading to the North Tower.

Tom could feel the time-turner's gold chain digging into the flesh around his neck, but he didn't have time to do anything more than running down the narrow spiral staircase with Hermione.

The next second, they heard such a conversation.

"—I think it's this way." Tom's voice came from outside.

Then Hermione's voice sounded: "I don't think so, you see, you can see a little of the lake outside the window, so this is the south side of the castle... We are going to the north tower."

Tom knew that in a few seconds they would find the staircase.

It's a very magical feeling: I'm in the stairs, and I'm outside the stairs at the same time. A straight line made a turn and intersected the past point.

"Come on!" Hermione's face turned pale, "We can't let our past selves see!"

Tom led Hermione upstairs.

The sound of their movements alarmed Tom and Hermione outside, who followed and found the staircase.

"My intuition tells me that this is the staircase leading to the north tower..." Tom used to say standing at the entrance of the stairs, but although he found the entrance, he did not rush in, but at the entrance earnestly forgave the surroundings for a while of the picture before entering.

At this time, Tom had already run to a small window on the tower, he turned into a phoenix, jumped out of the window with Hermione, and then landed on the ground lightly.

"Arithmetic divination?" Tom took off the gold chain of the time-turner from his neck, looked at Hermione, and asked for her opinion.

Hermione rolled her eyes, ignored him, walked around the castle for half a circle, and walked through the front door into the foyer. The hallway was now empty. A beam of golden sunlight shone on the marble floor through the outside glass window. Hermione was standing in the beam of sunlight. The bright light cast a shadow on her face. , making her facial features more three-dimensional.

She still didn't want to talk to Tom, and seemed to be in a little mood.

She went ahead and Tom followed.

"What do I have to do so you can calm down?" He took Hermione's hand and the two stopped in front of the stairs in the hallway.

Hermione turned to look at him.

Tom got a little closer and put the ball of black socks into the pocket of Hermione's robe. "It was my fault in the divination class..."

Hermione finally had a smile on her face, and she put her left hand lightly on Tom's ear, then got closer and touched his lips like a dragonfly.

Tom's eyes widened, and he felt as though he was doing it again.

"Forgive me?"

Hermione opened her eyes wide and shook her head very cutely, "It's just a reward for a good boy who knows his mistakes and corrects them."

She turned around, ran two steps like a bird, then turned to look at Tom, "Next time, you'll put it on me!"

Saying that, she sat on the stairs and put the black stockings back on.

"—If you don't hurry, you'll be late." A gentle voice came from their heads as Hermione changed her socks and put on her shoes.

It's Dumbledore again.

At this time, he stood on the stairs on the second floor with a smile on his face and looked down.

Old bee! Tom cursed inwardly, dragged Hermione, who was already blushing, and ran towards the classroom of arithmetic and divination.

The teacher of this class is Professor Setima Victor.

Arithmetic divination refers to the use of numbers to explain people's character and fate, or to predict the future. It can also be called "numerical occultism". It is different from traditional divination, which is based on interpreting vague images, or summarizing the inner meaning of things from random graphics or random written words. Arithmetic divination is based on a series of rules and rigorous mathematical operations. Arithmetic divination in the magical world is based on knowledge of Kabbalah and Pythagorean philosophy. They reduced the sum of all the letters to a numerical value from 1 to 9 and used it in divination.

For Hermione, the subject, which required rigorous logical thinking, was very appealing.

"8:57." When Tom arrived outside the empty arithmetic and divination classroom, he deliberately glanced at the time - thanks to Professor Trelawney, she did not delay the get out of class, but left the class a lot earlier.

If she doesn't leave until ten o'clock, then Tom's in trouble. Because the hourglass goes back one hour, Tom and Hermione have to be careful, because after going back in time, they don't stay where they were, but go back to where they were an hour ago.

This requires the time backtracker to be very, very careful. They have to remember when they're in a secluded environment, and don't look back and find themselves standing in the auditorium, seen by the whole school -- and that's it.

But there is good news: as long as this kind of thing doesn't happen, it won't happen.

This sentence sounds like nonsense, but it can very intuitively explain the various problems that arise in time rewind: that is, the facts observed by the time rewinder cannot be changed.

In other words, what Tom and Hermione saw in the past must happen. Tom and Hermione can do things where they can't see but as long as they are seen by the past, that can't be changed.

For example, Tom and Hermione in the past saw a reindeer dying on the edge of the Black Lake. No matter how hard they worked in the future, there would definitely be a reindeer that fell and died on the edge of the Black Lake.

Because this is an established fact and cannot be changed.

Even if Tom and Hermione save the world during backtracking, there's nothing to change the fact that there's a deer down by the lake.

Worse still, the more detailed they are, the harder it is to change the facts.

Take the reindeer as an example. If Tom wanted to save the deer, he could turn himself into a deer and fall by the lake - recreating what he saw earlier.

But if the previous Tom and Hermione confirmed the death of the reindeer, Tom would have to find a deer's carcass there to fool him.

Manipulating in an unknown space is the key to rewinding time.

Tom and Hermione pushed open the classroom door and walked in. Before going in, Tom's eyes swept across a broom closet in the corner of the corridor, and a faint smile appeared.

————

(づ￣3￣)づRecommended ticket~monthly ticket o(￣ε￣*)

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