The concessions do not seem extraordinary; nine out of ten natural scientists would grant them without hesitation, and, unless in a mood of unwonted suspicion, probably most philosophers too. That is just what makes this first argument so effective. You seem to be doing nothing more than ...
If there is enough evidence to sustain a charge, then an employer might reasonably conclude that there will always be a level of suspicion hanging over the employee and so it may as well proceed straight to dismissal rather than keep the employee on paid suspension for an extended period first...