(adv.) In a demonstrable manner; incontrovertibly; clearly.

absolutely assuredly certainly clearly de facto decidedly demonstrably factually for a certainty for real forsooth genuinely historically in actuality in all conscience in effect in fact in reality in truth in very sooth indeed indeedy indubitably literally manifestly nothing else but noticeably observably obviously of a truth patently positively quite really really-truly sensibly seriously truly unambiguously undeniably undoubtedly unmistakably verily veritably visibly with truth without doubt