"Metaphysical assertions, however, are statements of the psyche, and are therefore psychological. Whenever the Westerner hears the word “psychological,” it always sounds to him like “only psychological."

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I stand by my assertions that although you can know what happens to any individual species that you modify, you cannot be certain what will happen to the ecosystem. Also, we have a strange situation where we have malnourished fat people. It's not that we need more food. It's that we need to manage our food system better.

— Bill Nye