In my literature, there is an interesting to-and-fro between researchers from different schools of thought.
In one paper, Authors X, Y, et al. criticise Authors A, B, et al. for sticking with a theory which hypothesises a cognitive (linguistic) deficit in the absence of convincing/relevant perceptual deficits.
Authors X, Y et al make the stinging point that neuroscience research in general “has yet to find a cognitive deficit that arises detached from any neural underpinnings in terms of sensory or perceptual problems” – implying that you can only take a cognitive deficit seriously if there is physical/biological performance data to support it.
Presumably stung, Authors A, B et al respond in their subsequent paper by saying that this position is “an article of faith, not a scientific result”.
For discussion: to what extent are Authors A, B et al right to allege that the position of Authors X, Y et al is an article of faith, and to what extent, if at all, does this undermine the position of Authors X, Y et al?
(As flagged in passing in a footnote in my thesis.)