So the mathematical notions of infinity or logical notions like logical entailment are beyond a child of this age.

因此,对于无限这个数学概念,或者是,像逻辑蕴涵这样的逻辑概念,超出了该年龄阶段儿童的理解范围

耶鲁公开课 - 心理学导论课程节选

"People need to be very responsible about these things and not to get caught up in scare stories but instead take a reasoned and logical consideration of it and do what's best for their child, " he added.

BBC: Boy with measles

Just to make up numbers entirely to make the logical point, say that this part time work lasts until a child is 10, they have two at a 4 or 5 year interval (all reasonable enough numbers but entirely made up as I say).

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