According to observation, the universe is at the end of expansion, perhaps the end of contraction and the beginning of the Big Bang, and this process may be a cycle, tens of billions of years, or an infinite time, but the time is not absolute. According to relativity, matter and energy should be convertible.
3 black hole confirms that there is a black hole that devours everything. Is the white hole (assuming it exists) the exit of the black hole? The universe is not a single child. If the familiar universe is meaningful, does it mean that the meaningless universe exists?
The four-dimensional world we are familiar with, that is, the world of length, width and time, is not comprehensive. The space of ants is flat, and there is no concept of height, that is to say, the world they perceive is flat, which does not mean that there is no height in this dimension, and human perception is limited. Hawking speculated that the universe is 13 dimension, and our abilities cannot be recognized. It is also difficult for us ordinary people to imagine that the world of a person with an IQ of 180 is different from that of a person with an IQ of 100.
Paradox is a paradox because we understand with common sense that philosophy and science are unified and eventful in many places, which is not a simple theorem.
The above is nothing more than broadening your horizons. Finally, I want to say that a more essential theorem will always exist, no matter where it is, there is no once and for all truth.
I hope you can understand these questions if your thinking is touched (the law of conservation of energy is a paradox? ) I can only answer you like this.