撐不撐得住：作為一種性質
這一族是核心畫面本身：把某樣東西放到地上，看它站不站得住。差別只在放上去的是計畫、器物，還是一個人做事的習慣。
noun · C1
The quality of working in real life: whether a plan or an idea can really be carried out, and how well a thing does its job when you actually use it.
實用性；可行性
核心畫面
You can think of practicality as the moment an idea steps out of someone's head and has to stand on the ground. Up in the head, a plan can be any shape it likes. Down on the ground it meets time, money, space and tired people. Practicality is the word for what happens at that meeting: does the idea hold its weight, and is it easy to live with once it does?
practicality 可以想成一個想法從腦子裡走出來，落到地上站站看的那一刻。在腦子裡，計畫想多完美都行。到了地…更多收起
practicality 可以想成一個想法從腦子裡走出來，落到地上站站看的那一刻。在腦子裡，計畫想多完美都行。到了地上，它要面對時間、錢、空間，還有會累的人。這個字說的一直是那一刻的結果：它撐不撐得住？撐住之後，用起來順不順手？三個意思都在這個畫面上——有的講計畫站不站得住，有的講人有沒有這種眼光，有的講地上那一件一件的細節。From the word’s history
The packet's source entry gives the word as practical + -ity. The suffix turns the adjective into a quality you can name, weigh and argue about, which is exactly what the core image needs: not a thing that is practical, but the question of whether it is.
封包裡的字源資料寫著 practical 加上 -ity。這個字尾把形容詞變成一種可以指名、可以拿來比較的性質，正好對上核心畫面：討論的不是「某個實際的東西」，而是「它到底實際不實際」這個問題本身。
Wiktionary etymology supplied in this packet: From practical + -ity (source_ref kaikki:3f6f69a190036ae4:1078644715:9744).
Two branches
地上那一件一件的事：practicalities
同一個畫面，鏡頭往下拉近。不再問「站不站得住」，而是直接看地上散著的那些東西：執照、車票、鑰匙、誰幾點到。
noun · C1
The real details you have to deal with when you actually do something, rather than the idea of it — things like money, time, space, and who does what.
現實細節；實務問題