There have been so many controversies in the meaning of concept and particularly its place in the cognitive process of perception. The conceptualists, particularly, John McDowell, D. W. Hamlyn, Bill Brewer and Sonia Sedivy, argue that the content of perceptual experience is always in a kind of relation with propositional attitude such that beliefs, judgments, hopes and aspirations are instantaneously captured in perception. If this is granted, then, it becomes difficult to admit the possibility of non-conceptuality in perception.
Akintona, E. O. (2015). The Place of Concept in Human Cognitive Process of Perception: Why the Conceptualists Cannot Be Right? Open Journal of Philosophy, 05(01), 96–103. https://doi.org/10.4236/ojpp.2015.51011