上句见：Day385
The Story of Philosophy《哲学的故事》第1章Plato第7节VI. The Psychological Solution第10段第3句：

For we are likely to have trouble with these children of ours if we undertake to explain and justify everything to their simple minds. We shall have an especially hard time when they arrive at the age of twenty, and face the first scrutiny and test of what they have learned in all their years of equal education. Then will come a ruthless weeding out; the Great Elimination, we might cal lit. That test will be no mere academic examination; it will be practical as well as theoretical: "there shall also be toils and pains and conflicts prescribed for them"(413). Every kind of ability will have chance to show itself, and every sort of stupidity will be hunted out into the light. Those who fail will be assigned to the economic work of the nation; they will be business men, and clerks, and factory workers, and farmers. The test will be impartial and impersonal; whether one is to be a farmer or a philosopher will be determined not by monopolized opportunity or nepotic favoritism; the selection will be more democratic than democracy.
浙江大学译本：接着，无情的淘汰便会到来；我们姑目称之为“大筛选”。

解析

1、Then will come a ruthless weeding out;
接着就展开无情的清除；
weed out: to remove (people or things that are not wanted) from a group清除；淘汰
With a solid vision and long-term goals, you can weed out the essentials from the non-essentials.有了坚定的未来构想和长期目标，你就可以从非必需中筛选出必需品。《自我提升必备书单》
2、the Great Elimination, we might cal lit.
可称之为“大淘汰”。

这句暗示了柏拉图的理想国是很残酷的。如果有这么一关大淘汰，让那些人怎么不卷不焦虑呢？不知父母为谁或者说父母无权过问这一淘汰，这一前提已经让负面影响降低了七八层吧。在教育这方面，理想国中的父母只是吃瓜群众，只是生育机器，有种只管生不管养的状态。

接着就展开无情的清除；可称之为“大淘汰”。