most certainly, assuredly:
(
s.xiv2;
MS: c.1400
)
tresadecertes qe, si ascum a moy ovesque un fer ardant enfoweroit le purnelle del oille, graunt dolour j'avroy
(Latin: Profecto si quis in pupillam oculi ferro ignito transfoderet, magnum dolorem haberem)
Lichfield 60.8
tresadecertes (s.xiv2)