In other words, should you label from 0 or 1?

Don't laugh, this is a serious question, a big question of deciding whether 0 is a natural number or not!

0 is neither positive nor negative, the opposite of 0 is 0, the absolute value of 0 is 0, the square root of 0 is 0, the square root of 0 is 0, the cube root of 0 is 0, 0 multiplied by any number is equal to 0, and the power of 0 of any number other than 0 is equal to 1. 0 cannot appear as a denominator, and all multiples of 0 are 0. 0 is not a prime number, nor is it a composite number. 0 is the smallest perfect square number, 0 has no reciprocal and negative reciprocal, 0 cannot be the base or true number of logarithms, and the factorial of 0 is equal to 1. In complex sets, 0 is the smallest number of modulus, and it is the only element that has no radius definition. 0 is the only constant that can be used as an infinitesimal quantity. The limit of the ratio of the lower order infinitesimal to the higher order infinitesimal is infinity, and 0 is the higher order infinitesimal of any infinitesimal except itself. In a definite integral, when the upper and lower limits of the integral are equal, the integral value is always 0. In probability theory, the probability of an impossible event, or the probability of an event located in a particular independent variable in a continuous probability distribution, is 0. However, an event with a probability of zero is not necessarily an impossible event. Finally, in Tanmei culture, 0 refers to ......

Ahem, so is 0 a natural number with so many properties?

Luo Xiaotian remembered that when he was in elementary school, 0 was not a natural number, and after he went to junior high school, 0 was a natural number, so is 0 a natural number related to a person's age?

In this way, as we get older, there are indeed many things that have changed, things that were previously thought to be absolutely correct have become ambiguous, some hobbies have disappeared, and some things that were originally scoffed at have become more and more attractive. Of course, as you get older, some get taller, some get longer, and some get thicker, it's all possible!

Well, far away...... So, is 0 a natural number or not?!

Luo Xiaotian, who was thinking about this problem uncertainly, suddenly heard a noise from somewhere, and when he turned around, he saw Hatschran walking out of a certain door.

"Why are you here?!"

Seeing Luo Xiaotian seemed to startle Hart, a pair of red eyes stared hard. In fact, Luo Xiaotian also wanted to ask why Hart appeared here, but because his mouth was too slow, he was preempted, and just when Luo Xiaotian was thinking about how to organize the language to tell Hart the explosive fact of "we are all in heaven", Hart asked again.

"We went to heaven, you know!"

Well, it seems that there is no need to explain this yourself.

"How do you know?"

"Looks like you know, the room I came to before... Which door did I come in?"

I didn't even know which door I came out from, Luo Xiaotian scoffed, and then looked at the ...... behind him Where's the door?!

I'm still here!

Luo Xiaotian looked around, obviously the layout of the room had not changed at all, and the doors were still six regular doors, but Luo Xiaotian really couldn't confirm which door he took at the beginning.

Even Luo Xiaotian couldn't confirm whether he had moved, was it because he had lost his sense of direction because he moved?

Luo Xiaotian regretted that he didn't put the labels on each door before, and if he knew it, he wouldn't have to worry about whether 0 is a natural number or not, it doesn't make any sense at all!

So, is 0 a natural number or not?

......

Luo Xiaotian posted the numbers of the six doors... Well, it started from 1, and then Luo Xiaotian and Hart started from Gate 1, intending to see what was behind each door.

After Gate 1, Luo Xiaotian became more and more suspicious the more he walked, the surrounding scene seemed familiar, could it be said that he chose the right one the first time?

"I've just walked this road before!"

It was not Luo Xiaotian who spoke, but Hart. Anyway, when did this kid learn to steal lines?

But... What do you mean?

Luo Xiaotian did not respond to Hart's words, and soon, the two walked to the end of the passage, and Luo Xiaotian was able to confirm that although this road looked the same as the one he had walked before, it was actually not the one he had walked.

The stone that had been stuck in the door was gone.

Walking out of this door, there was also a hall outside, and the doors of nine colors were exactly the same as the ones I had seen before.

"Do you know what's inside those doors?"

Luo Xiaotian asked Hart, and by the way, he also confirmed his thoughts.

"Inside are hats, huge hats!"

Sure enough, thinking like this, Luo Xiaotian walked to the door of a certain room in this hall, and then opened the door.

Behind this green door is a huge green beret, the style and color of which can roughly reference the British Royal Marines and the US Army Special Forces...... This is not to say that there is some secret relationship between the two teams, but in short, it is probably a green beret!

Like the top hat I've seen before, this green beret takes up an entire room, except that because it's not as tall as the top hat, the room is only occupied by the bottom half, and nothing else is different.

"Hey, I don't see a hat like this!"

Hart's words pulled Luo Xiaotian back from thinking about the dialectical relationship between green and hats, but this illustrates a problem, this hall full of hats and other places is not where he and Hart have been, and if Luo Xiaotian guesses correctly, the same settings are set up behind doors one to six, except for the different styles of hats.

"What kind of hat are you seeing, Hart?"

"Hmm... I don't know what to call it, but the hat is beautiful, made of huge red and green feathers! I want to pluck one off, but I don't know how they are connected, I can't pull it out!"

A hat made of huge red and green feathers? What is that?!

Luo Xiaotian was stunned for a moment, and then began to think hard about what kind of hat would have such a shape, but unfortunately there were no clues at all. What should a hat made of moonlight leaves be called a laurel wreath, a hat made of flowers is called a garland, and a hat made of bird feathers should be called?

Bird hats, bird crowns, bird rings, feather crowns, hair rings, feather crowns, feather rings?

The names "Feather Crown" and "Feather Ring" sound good, so why don't you call it the Sorrow of the Bird!

Hawkers, now is not the time to dwell on this problem, after Luo Xiaotian confirmed the hats in the nine rooms, he recorded the number of the room and the correspondence of the hats, and then walked towards the room where the console was located.

If that's right, it should be the same as what Luo Xiaotian had seen before.