There is an implicit assumption in the definition of field (gravitational field, electric field and magnetic field): assuming that there is a unit point field source (unit point mass or unit positive point charge) on the observation point P, the force it receives (gravity, The size and direction of the Coulomb force and magnetic force) are the size and direction of the strength of the field at this point. When the field is further extended to be a continuous and differentiable function in space-time, the above implicit assumption is further expanded to: there is a point field source of one unit at all spatial positions in space-time. The objective reality is that the distribution of field sources in space-time is neither continuous nor stable. As a result, many physical theories, theorems and laws based on fields and field theories cannot be consistent with objective facts. Such as: the law of electromagnetic induction, Gauss's law, Hubble's law, Maxwell's equations, the theory of relativity, quantum mechanics and the Big Bang theory, etc. This article conducts some discussion and certification on this point, and I hope that interested friends will provide more valuable opinions and suggestions.

场（万有引力场、电场和磁场）的定义中隐含了一个假设：假设观测点P点上存在一个一个单位的点场源（单位点质量或单位正点电荷），它所受到的力（万有引力、库仑力和磁力）的大小与方向即为该点上的场的强度的大小与方向。当将场进一步拓展为在时空中为连续可导的函数时，则上述隐含的假设被进一步扩充为：时空中所有的空间位置上均存在一个一个单位的点场源。而客观实际情况是：场源在时空中的分布并非连续，也非稳定不变的。由此导致了诸多以场和场论为基础的物理学理论、定理和定律就不可能与客观事实相符了。如：电磁感应定律、高斯定律、哈勃定律、麦克斯韦方程组、相对论、量子力学和宇宙大爆炸论等。本文就此进行一些探讨与认证，希望有兴趣的朋友们多提宝贵意见与建议。