David Malet Armstrong
Falsafa ya Armstrong ni ya sili sana. Armstrong anasema kuwa mfumo wake wa falsafa ni huu "The assumption that all that exists is the space time world, the physical world as we say". Anahalalisha hii kwa kusema kwamba ulimwengu wa kidunia "unaonekana dhahiri upo" wakati mambo mengine "yanaonekana kuwa ya kisaikolojia tu".