Everything leaks.
There are no clear-cut level distinctions in nature. Neural software bleeds into neural firmware, neural firmware bleeds into neural hardware, psychology bleeds into biology and biology bleeds into physics. Body bleeds into mind and mind bleeds into world. Philosophy bleeds into science and science bleeds back.The idea of levels is a useful fiction, great for hygienic text-book writing and quick answers that defend our local turf but seldom advance scientific understanding).