They elaborate a conception of human being as a potentially "transcendental subject" defined as a subject whose "experience" is of a kind capable of grounding universally valid claims.
^^^^^ CB; Whence the source of this potential in humans ? Isn't it our sociality ? Transcendental subjectivity is grounded in transgenerational sociality, culture. Do they demystify this concept of "transcendental subject" ?
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As part of the argument defending this, they point out that the logical implication of the conventional concept of experience they are disputing is "solipsism of the present moment", an implication they treat as a reductio ad absurdum.