點解智障人士嘅樣貌多數同一般人有明顯分別？

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由於你既問題係「多數」有分別

我估計係Observation bias

假設有弱智人士加弱智樣，及弱智人士加正常樣，而你只會見到前者時，先令你諗起呢一個人係弱智，而你見到後者嗰陣時你根本唔會發現佢係弱智，呢個不停嘅biased observation加強你相信弱智人士係必然有一個弱智樣，亦令你有「多數」嘅結論

殘酷既答案

因為人類都只不過係動物
原始動物時為求生存
唔會想浪費資源（食物，時間）係冇用既人或事上
而身體有缺陷既 幫助唔到群體發展既 就要被淘汰
所以個樣會有分別 等其他人放資源係其他人身上

The chromosomes are holders of the genes, those bits of DNA that direct the production of a wide array of materials the body needs,” says Mark A. Griffin, a father with a child dealing with Down Syndrome. In chromosome 21, the presence of an extra set of genes can lead to “over expression.” In most genes, over expression has little effect on the body, but Down Syndrome genes seem to reject that alternative hypothesis. The question of which genes are directly correlated with the similar appearances of Down Syndrome patients is still a mystery. Scientists have come to a false positive conclusion that yes, these genes have to be causing the deformities in these individual’s appearances, but what exact genes they are is still too difficult to identify.
點解佢地差唔多樣 仲未研究到

你邏輯唔啱，智障人士樣有共同特徵唔代表有類似特徵嘅人就係智障

唔執唔打扮就唔靚果d,就唔會係天生靚女吧....

但呢種尖圓應該係骨格問題唔係脂肪喎
面長同鼻長同眼距同嘴型都有分別

你靚女 但係你本身既儀容無整理 頭髮成舊髮菜咁 你望到都即刻另轉頭啦
係咪先

染色體出現問題導致樣貌同正常人嘅樣貌有異

面部三叉神經係要相當腦力去運作，你試下打住飛機做數學，一樣會低低地

即刻諗起日和基因論

好似身體會衰老，但智力同唔知邊部分停止咗發展，所以個樣就有問題。

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