yep, saw this 成语 on "大头芬的世界"...
well i dunno whether this kind of thing really exist... can pple ever know something without pple telling them explicitly or implicitly? dun think so... many things can come as simple logic and common sense to u now, but i suppose these things were taught to u when you were very young, so young that you failed to realise that you were actually learning these "simple common sense" things...
"dun assume, always confirm"...this phrase often used in the army is actually true and i think pple just belittle this short statement. it's only until bad things happen then pple start to realise that they actually dun have that so-called common sense...but humans are a forgetful lot...few years later, they would have questioned a person's common-sense level when he or she commits the same mistake...
yep, parents often set a "common-sense level" for their children...sometimes they expect their children to do things in a logical manner but they did not teach them to do so... well i have no specific example for it, cuz i am also stuck in the question of whether something is common-sense or not...this explains why i am writing here to say something about common-sense...about things that can be 不言而喻...
besides "common sense" stuff that many pple think can be 不言而喻, i think emotions, feelings are also sometimes treated as "things" that pple can relate to without saying...how the h-ll can your parents know you love and respect them? they wun know clearly unless u do something or say something that confirms this mutual love. well, although i am saying all these, i think i have nv said anything that reciprocates the love from my parents... done something? not really too, except doing my best in my studies and make them proud...
isn't it time to do something?