This essai develops a philosophical perspective on managerial cognitio
n. More precisely, it offers an epistemological critique of orthodox m
odels of strategic management. The critique is based on the confrontat
ion of these models with a diverse set of philosophical texts on knowl
edge and action. The orthodoxy is composed of the three prescriptive s
chools identified by Mintzberg (1990) and considered as explicit colle
ctive knowledge. To say nothing of the omission of socio-political for
ces at work in strategy formation, three main biases are elicited and
discussed: a bias towards thinking to the detriment of other forms of
reasoning, a bias towards binary logic, and the failure to recognize f
eeling as a source of reason. We suggest that philosophical questionin
g - epistemological and ethical - can help practitioners and scholars
renew their management models, recipes and theories.