Approximate applicability of Ehrenfest relations for second order phase transitions to the glass transition is often taken as a reason to consider an “underlying” second order phase transition. The partial applicability of such relations is much better understandable in terms of a purely kinetic theory for the glass transition. The basis is the association of the glass transition with a dynamic percolation (of pair processes, not of particles), reasonable temperature-dependent scaling properties of the entropy and thermal expansion coefficients (compatible with the Lindemann criterion for melting) and the approximate correlation between the glass temperature and the melting temperature (itself related to the Lindemann criterion, the kinetic nature of the glass transition, and the temperature-dependent scaling properties of the entropy, etc.).