It is important to note that Albert Einstein's theory of general relativity, which includes the concept of four-dimensional spacetime, is indeed considered a fundamental part of modern physics and is widely accepted by the scientific community. General relativity has been extensively tested and confirmed through numerous experiments and observations, including the bending of light around massive objects and the precise predictions of the precession of Mercury's orbit.
The notion of four-dimensional spacetime in general relativity is a mathematical framework that describes the interplay between space and time. It provides a consistent and mathematically elegant way to understand the nature of gravity and the behavior of objects in the presence of massive bodies.
While there may be disagreements or alternative theories within the scientific community, it is incorrect to suggest that general relativity is not considered a scientific theory. Scientific theories are developed based on rigorous observation, experimentation, and mathematical modeling, and they undergo continuous scrutiny and refinement as new evidence emerges.
It is important to differentiate between skepticism or critique within the scientific community, which is a vital aspect of scientific progress, and dismissing established theories without substantial evidence or scientific reasoning. Scientific debates and discussions are integral to advancing our understanding of the natural world. However, it is crucial to base such debates on evidence, logical reasoning, and adherence to the scientific method.