If I'm not mistaken; If I remember correctly; If I remember rightly

firm; unshakeable; resolute

accurate; precise; exact; appropriate; apt; right

to make sure; to check; to ascertain; to confirm; to verify

belay; belaying

certain; sure; definite; reliable; sound; solid; safe; secure

clear; precise; definite; distinct

confirmation; verification; validation; review; check; affirmation; identification

establishment; settlement

decision; settlement; confirmation; establishment

probability; likelihood; chances

conviction; belief; confidence