rock solid

accurate always there authentic authoritative convincing credible dependable ethical exact honest honorable kosher levelheaded mature on the level on the up and up open plausible principled realistic responsible righteous saintly secure sensible solid square steadfast straight there to be trusted tried tried-and-true true true-blue trustable truthful unfailing up-front upright valid veracious

corrupt unbelievable undependable unreliable untrustworthy

bottomless boundless eternal inexhaustible steadfast unflagging

absolute assiduous ceaseless come-through consistent constant continual continuing continuous counted-on delivering dependable diligent dyed-in-the-wool endless faithful infallible invariable loyal never-failing persistent reliable same solid staunch straight sure surefire there tried-and-true true trustworthy unlimited unrelenting

changing limited

failing impermanent uncertain unsure

based on hard data based on hard facts factual proven solid substantiated