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I am not questioning the functionality of this line:
conditionalfilter(x,x,y,"iscombed(threshold=14)","=","false")
but this line:
conditionalfilter(x,x,y,"iscombed","<","14")
That line is nothing more then a slow way to return all the frames from the "x" clip. The operator and value strings "<" and "14" have nothing to do with any parameters the function takes. They are used only in conjunction with the return value from the function to see if the statement is true. And in the case of IsCombed the return value is only false or true (0 or 1). So testing if the return value is less then 14 will always return true and that line will always return the frame from source 1 (x). You can test it yourself, any "<" or ">" test won't make a difference (it will always either return all source "x" frames or all source "y" frames) for IsCombed unless it differentiates between 0 and 1 (true or false).
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