错误的参数＃3到'格式'（预期的字符串，得到布尔值）？

Question

编辑LUA文件的Rainmeter的皮肤“你需要一个外套” 得到错误的标题为这个代码

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--[[ Given the current temperature, return the appropriate 
    string for the main string meter ]] 
local function getMainString(temp) 
local negation = (temp > Settings.Ss_Limit) and " don't" or "" 
local summerwear = (temp < Settings.Ss_Limit) and (temp > Settings.Vest_Limit) and "shirt and shorts" 
local innerwear = (temp < Settings.Vest_Limit) and (temp > Settings.Jacket_Limit) and "vest" 
local southerwear = (temp < Settings.Jacket_Limit) and (temp > Settings.Coat_Limit) and "jacket" 
local outerwear = (temp < Settings.Coat_Limit) and "coat" 
return string.format("You%s need a %s", negation, (summerwear or innerwear or southerwear or outerwear)) 
end 

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它应该给基于正确的服装温度。我已经尝试了不同的地点温度变化，并且唯一一次我得到错误是当温度超过Ss_limit。我没有太多的编码经验，所以预先感谢您