Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.
--------
Question: Glasses are mixtures of oxides, the main component of which is silica (sio2). silica is called the glass former, while additives are referred to as this?

Answer: natural modifiers

Question: Because they are charged (polar), these ions do not diffuse through what?

Answer: substrate

Question: The validity of thought experiments, of course, is determined by this?

Answer:
predictive observation