Not all networks obey the power law or scale-free law. While many real-world networks have been observed to exhibit power-law behavior, there are also many networks that do not. The scale-free law is a statistical property that describes the distribution of the number of connections (or degrees) of nodes in a network. In a scale-free network, the probability of a node having k connections follows a power law distribution, meaning that the probability of a node having a large number of connections is proportional to a power of k. However, not all networks exhibit this property. Some networks may have a different distribution of degrees, such as a normal distribution or a lognormal distribution. Additionally, some networks may have a mixed distribution of degrees, where some nodes follow a power law distribution while others do not. Therefore, it is not accurate to say that all networks obey the power law or scale-free law.