throughout entire series, except for a couple of times with saitama and gyoro gyoro(although she misjudged the strength of Tornado of Terror Tsu-somethingorother)(and also Fubuki was able to tell that Sonic was strong, albeit "by his stance"), everyone has an ability score of zero in telling other's strength — i mean, i know that there are monsters, but even before they cause massive havoc, they are given an estemation of desaster level, so why can't hero's or really anyone tell - oh this oponent is strong - or is stronger than me (and i am not talking about Stinger's self-absorption and self-overconfidence in the seafolk battles)