‘squiggles’ and ‘squoggles’

[IbrahimSanad]

What is meant by "‘squiggles’ and ‘squoggles’" in this context:

Searle relied on a thought experiment that’s still controversial today: Searle is in a windowless room, with a slot through which paper slips carrying ‘squiggles’ and ‘squoggles’ are passed in. There is a box of slips carrying similar doodles, and a rule book saying that if a squiggle is passed in then Searle should pass a blingle-blungle out, or perhaps go through a long sequence of doodle pairings before passing some slip out.

Also, What is meant by "blingle-blungle"? Thanks in advance.

Source: Artificial Intelligence by Margaret A. Boden

 

[emsr2d2]

See HERE for the definition of "squiggle" (noun). As far as I can tell, all the other words in bold were invented by the person who created the experiment.

 

[jutfrank]

Both squiggle and squoggle, as well as blingle-blungle all mean a symbol of unrecognisable meaning. Searle usually uses the example of Chinese characters, since those are pretty much meaningless to the vast majority of English native-speakers.

As emsr2d2 has said, squoggle and blingle-blungle are made-up words. They were created to emphasise that what they signify is nonsense for the person living in the windowless room.