Some times it is needed to use multiple Conditional Symbols. For example if you have two conditional Symbols (lets say PaidNoAds and WithAds) and you have to add SimpleMediaManager which requires its own Conditional Symbols according to what you will use it for. Then what do you do? You have to use the coditional symbols of SMM and also in the same time one of the above. If you do this then the execution passes from both IFs if you choose SMM_ZOOM:
#if PayNoAds OR SMM_ZOOM
'DO SOMETHING
#end if
#if WithAds OR SMM_ZOOM
'DO SOMETHING
#end if
I know that it is possible to replace conditional symbols with variables checking to know which condition is valid but I still think it is a nice thing to have.