A “change in methods of production in a given state of knowledge” is, strictly speaking, a contradiction in terms.#Quoted in Ludwig Lachmann, Capital and Its Structure (1956)
There is no such phenomenon in real life as [capital] accumulation taking place in a given state of technical knowledge. The idea was introduced into economic theory only to give a meaning to the concept of the marginal productivity of capital, just as the pseudo-production function was constructed in order to show that it has no meaning.#