以下都是从网上找到的有关 lay theory 的资料：
英文解释：
Lay-theories are theories that aren't scientific but they can be found in expressions and cliches. Examples of lay theories are, "the apple doesn't fall far from the tree," "liquor before beer you're in the clear, beer before liquor never sicker."
中文解释：
甚麼是常民理论 (lay theories)？
一般人对於社会世界现象的本质是甚麼？事务是如何运作？以及日常生活的各种现象，都有一套自己的看法。这套结合观察、媒体报导、个人经验所形成的看法就是所谓“常民理论”(lay theories)。
