Similar to Template:Yesno-yes
Template:If first display both
Template:If first display bothTemplate:If IP
Template:If IPTemplate:If last display both
Template:If last display bothTemplate:If then show
Template:If then showTemplate:Ifempty
Template:If emptyTemplate:Ifeq
Template:IfeqTemplate:Ifnoerror then show
Template:Ifnoerror then showTemplate:Ifnoteq then show
Template:Ifnoteq then showTemplate:Ifnumber
Template:IfnumberTemplate:Ifsubst
Template:IfsubstTemplate:Isnumeric
Template:IsnumericTemplate:Issubst
Template:IssubstTemplate:Main other
Template:Main otherTemplate:Module other
Template:Module otherTemplate:Namespace detect
Template:Namespace detectTemplate:Ns has subpages
Template:Ns has subpagesTemplate:ParmPart
Template:ParmPartTemplate:Preview warning
Template:Preview warning
Template:\sandbox
Template:\sandboxTemplate:Sandbox other
Template:Sandbox otherTemplate:Split
Template:Talk other
Template:Talk otherTemplate:Talkspace detect
Template:Talkspace detectTemplate:Template other
Template:Template otherTemplate:User other
Template:User otherTemplate:User talk other
Template:User talk otherTemplate:Yesno
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Template:Yesno-no
Template:Yesno-no