[OSM-legal-talk] Is there a PD part in OSM?

[Martin Koppenhoefer]

I wonder if data you download now or did so in the past from OSM
servers can be used as PD data. There are some users who have publicly
declared that they consider their contributions to OSM to be in the
public domain. For simplicity I'd like to restrict this question to
users who have either made this declaration in their user description
or have linked their wiki account from their user description (i.e. it
is clear, which OSM username the declaration was made for and that the
user was the owner of this account).

Is it possible to download this data from OSM servers (or
mirrors/extracts/elaborations from this) under a cc-by-sa or ODbL
license and still consider it PD due to the dual licensing, the user
has expressed he wishes his data to be under?

cheers,
Martin