08年46) believe, assert, claim, argue, assume, maintain, contend, point out, be convinced that, accept, prove, demonstrate, validate, state, scribe, tell, show, consider, opine, difficulty, difficult, compensate, compensate for, advantage, advantageous, advance, force, strength, power, thus, therefore, hence, enable, detect, detector, error, mistake, false, flaw, shortcoming, reason, reasoned, reasoning, reasonable, observe, observation, observer;