You would have to exclude from this great philosophical tradition all of the accounts which belong to the affective turn in philosophy and the social sciences, including Pragmatism, hermeneutics, phenomenology, poststructuralism and embodied, enactive approaches in cognitive neuroscience. These approaches flip your script on its head without simply returning to Hume’s emotivism.
Affectivity is the cradle within which cognition rests. It orients and provides salience and relevance to thought. Cognitive and affective processes are closely interdependent, with affect, emotion and sensation functioning in multiple ways and at multiple levels to situate or attune the context of our conceptual dealings with the world.
While more traditional approaches in philosophy and psychology treated affective phenomena as at best peripheral to, and typically disruptive of, rational processes, embodied cognitive theories take pains to present emotion and thought as an indissociable interaction. According to the newer thinking, affective tonality is never absent from cognition. As Matthew Ratcliffe puts it,
“moods are no longer a subjective window-dressing on privileged theoretical perspectives but a background that constitutes the sense of all intentionalities, whether theoretical or practical”
The absence of emotion comprises a state of cognitive and behavioural paralysis rather than fully functional cognition, stripped of ‘mere’ affect. A phenomenology without affect is a phenomenology that guts the world of all its significance. The experienced world is ordinarily enriched by the feelings that we sew into it, that imbue it with value and light it up as an arena of cognitive and behavioural possibilities.
So cognition without affect is not, according to William James, in any sense complete. It is an extreme phenomenological privation that strips the world of all meaning, a state of depression or ‘melancholia’.
The neuroscientist Antonio Damasio argues:
“…emotions play a role in constraining and structuring the realm of explicit deliberation, restricting deliberation to a small number of options and structuring patterns of reasoning, so that we remain focused and relevant in our activities, able to act towards goals without becoming distracted by trivia. Thus emotions and feelings serve to constrain and focus our attention, so that we only consider from a pre-structured set of options.