Arknights is too real, right?

Space-time is a collective noun, that is, time and space.

The connotation of time is endless and eternal, and the connotation of space is unbounded and eternal. "Endless" and "unbounded" are the absolute concepts of time and space.

"Hmm~hmm~hmm~hmm traveling through time and space~"

This lyric literally means traveling through time and space. This is obviously a contradictory sentence. The sky, deep sea, and isolated islands can all travel through time, but how do we travel through time and space?

In other words, if a race has the ability to travel through time and space, it will completely subvert the existing theories of the world, because it involves an unavoidable problem, time paradox.

Time paradox is caused by time travel or traveling through time and space. The logical derivation is contradictory. To put it simply, the same person in the same space cannot appear on the same timeline, no matter what point in time he comes from. Can't show up.

Because, according to the evolution of the butterfly effect, once a person has behavioral deviations in the past or future, the chain reaction will be unpredictable. If it really happens, theoretically it will even be so serious that the world will disappear due to the collapse of logic. .

However, unless there is one situation.

That is, the person who travels through time has never had any impact on the world from beginning to end. His birth, growth, and final disappearance have no impact on the trajectory of the current world. To the world, he is People who don't exist.

Of course, this situation is very difficult to happen, and it is impossible to have no impact on the world at all. As long as you eat or breathe, it will inevitably cause a small amount of impact. However, the magnitude of this impact will become a factor in traveling through time and space. What about the conditions?

Since it is impossible to have no impact at all, then reduce the impact to the minimum. So, how can you have the least impact?

If a person or race does not exist in the eyes of living things around the world, and it is something that has not been heard of, even if someone has heard of it, but has not actually seen it, then it has the least influence.

Combining the above analysis, there is only one ethnic group that fits the criteria, the Deep Sea Clan.

Looking at Skadi's confused expression, Xia Feng felt that she herself did not know the information about time and space travel, which meant that it was very possible that this phenomenon occurred without her knowledge.

Taking another ten thousand steps back, Xia Feng is now completely unable to determine whether the past events she just mentioned are time travel.

If analyzed from an absolutely objective perspective, this is no longer a question of science or magic, but a philosophical question.

For example, a primary school student picked up an injured small animal and brought the small animal to the class. In order to cultivate the love of the students, the class teacher asked the class teacher to use the class fee to buy food for the small animal. Then the question is, what happened to this animal? What is it? From the first moment they saw it, the whole class thought this animal was a cat. Of course, the monitor went to buy cat food.

But in fact, this animal is not a cat, but a turtle. Are you surprised? It is a turtle. You can think that all the students in this class have been kicked in the head by a donkey, but they are stubborn and think that this little turtle is a cat. So, in a sense in this time and space, this turtle is a cat. A cat, because of its existence, leads to the sale of a pack of cat food, and through the dissemination of information by students, the discovery of a cat may have other effects.

This is an alternative embodiment of idealism. A person who has traveled back from the future through a time machine is standing on the road, but all passers-by think he is a psychopath. In that case, he is a psychopath, unless his Behavior can cause qualitative change, otherwise the impact it can have is just a psychotic impact.

In other words, if Xia Feng thinks that the past events mentioned by Scarty are related to time travel, or that it is just a dream of hers, the result will be biased, but this bias is in the future, and he has no way of knowing now.

think carefully.

If Skadi experienced time travel that even she herself didn’t know about, then that would be

kindness?

Thinking of this, Xia Feng suddenly realized a problem, as if he suddenly discovered a hidden third road at a fork in the road that turned left or right, giving him a flash of inspiration.

On the deck, Xia Feng frowned and began to think seriously.

In his understanding, all changes in things are relative, that is, they require reference.

For example, in a 100-meter race, if you fall down just after reaching 20 meters, then you are falling behind. If everyone falls down at this time, then you are not falling behind, just unchanged. However, if other people fall down at this time, Not only did you fall, but you also moved backwards in a strange way, so in a sense, even though you were lying on the ground and not moving, you were actually moving forward.

If the time and space of the world are changed, whether it is going backwards or forwards, everything will change according to the order of evolution, but you will not change.

So is this a kind of time travel?

No matter when, the boundless ocean looks the same. Even the creatures living in the sea find it difficult to detect changes. To put it bluntly, if the time in this world goes back three years, the scenery he sees on the boat will also be the same. There will be no changes.

The difference is that he may meet someone who existed in this time and space three years ago.

Just like what Skadi mentioned about the past.

Seeing Skadi's confused look, Xia Feng made a bold guess in his heart.

The Deep Sea Clan's so-called traveling through time and space does not mean traveling through time, but is not affected by changes in time and space. This range may be the entire clan, or specific people in the clan, such as bloodline.

Of course, even if the facts were as he guessed, he still didn't feel clear, because there was another question he couldn't figure out the answer to. Who was the person Skadi saw back then?

To be honest, Xia Feng already had a terrifying guess in his mind, but even he couldn't believe the result, or rather he didn't want to believe it.

The sunset on the horizon is getting redder and redder, and it seems that tomorrow will be a good day.

Skadi at the edge of the deck flicked her hair.

"Why did you suddenly stop talking?"

Xia Feng immediately came back from his thoughts.

"Oh, it's nothing, I just remembered something, you can continue."

"I have nothing to say. If you have no other questions, we may have to say goodbye. Although I am very interested in the braised fish you just mentioned, I'm afraid I won't have the chance. I still have important things to do. "

After saying that, Skadi stood up and easily raised the strange giant sword next to him with one hand.

Seeing what she wanted to say, Xia Feng immediately spoke.

"Wait a minute, I have one last question."