Aha - but when you consider just how many times there's a random muppet over-betting the table with any A or K then you can follow his "logic". (i.e. he uses his own methodology which is probably based solely around those 2 cards so therefore his Jacks would beat the detritus that he'd usually bet on)...

Mind you - that's why I frequently won't bet for the first few hands to ensure I've identified the ones who bet that way and then just play round their failings....