(thanks to Timm Lichte for this summary)

The discussion started by looking at light-verb constructions:
    - verb event and noun event: can they different?
        (ex) I quickly took  a slow walk.
        (ex) I quickly walked slowly.
        (ex) I didn't take the/my usual walk.  != I usually don't walk.
    - constraints on the combination of light-verb and noun?
        - semantic/predictable
        - lexical/arbitrary
        (ex) take a walk/#kiss
        (ex) pay attention/visit/respect
    
Terminology was made clear: difference between transparent and decomposable
    - transparent: literal and idiomatic meaning available
    - decomposable: just the idiomatic meaning

Other aspects which have been mentioned:

- degrees of decomposability
- hierarchy of tests (in terms decomposability)?
    - passivization > internal modification > pronominalization >
topicalization > relative clause formation > isolated occurrence of  parts of MWE
    - does passivization belong here? Language-specific?

- general connection to metaphorical speech?

- corpora:
    - is decomposability reflected in the statistics?
        - as a tool for validation?
    - compositional distributional semantics useful?
      
- psycholinguistic work
    - Could the results be useful/relevant?
    - WG2?
    - obstacles: different grouping of MWE; unconclusive results or  difficult to see what they mean for us.

Finally, the need to invite people to participate in these debates have been pointed out.