Does 'In the felled seams of shirts and jeans, for example, the visible stitches might be of a color designed to decorate the garment.' hold a position of neutrality in relation to 'The felled seams of shirts are visible.'
In the felled seams of shirts and jeans, for example, the visible stitches might be of a color designed to decorate the garment.###The felled seams of shirts are visible.