Ja, már látom, te is innen szedted az alábbi mondatot, csakhogy az nem a materializmus, hanem a methodological naturalism meghatározása volt:
"Science uses a working assumption, sometimes known as methodological naturalism, that observable events in nature are explained only by natural causes without assuming the existence or non-existence of the supernatural."
A materializmus alap-definíciója ez:
"In philosophy, materialism is that form of physicalism which holds that the only thing that can truly be said to exist is matter; that fundamentally, all things are composed of material and all phenomena are the result of material interactions."
Vannak ehhez képest bõvített definíciók is, pl. amit írtam az ismert részekbõl álló mindenségrõl.