Multiple studies demonstrate that neurons and other excitable cells maintain their negative resting membrane potential through established ion concentration gradients and selective membrane permeability.
The claim is specific, empirical, and falsifiable. Papers [1], [6], and [10] directly support the physiological principles that ion concentration gradients (such as potassium and sodium) and membrane permeability govern the resting membrane potential. No papers refute this well-established consensus in neurophysiology.