Schengen isn't "different from EU". It originally was separate from EU, but since 1999 has been an aspect of the EU. Per Wikipedia:
> Originally, the Schengen treaties and the rules adopted under them operated independently from the European Union. However, in 1999 they were incorporated into European Union law by the Amsterdam Treaty, while providing opt-outs for the only two EU member states that had remained outside the Area: Ireland and the United Kingdom (which subsequently withdrew from the EU in 2020). Schengen is now a core part of EU law, and all EU member states without an opt-out which have not already joined the Schengen Area are legally obliged to do so when technical requirements have been met. Several non-EU countries are included in the area through special association agreements.
Yes, but the inclusion of a non-EU country in an EU programme as a special exception (not unique to Schengen) doesn’t thereby make it a non-EU programme, which is a natural interpretation of what you said
I never wrote that Schengen "is not an EU programme", I pointed out succintly that the countries in Schengen and the countries in EU are not the same thing.
In fact there are also EU countries NOT in Schengen. And there are countries in Europe but not in the EU which are not in Schengen either.
Schengen isn't "different from EU". It originally was separate from EU, but since 1999 has been an aspect of the EU. Per Wikipedia:
> Originally, the Schengen treaties and the rules adopted under them operated independently from the European Union. However, in 1999 they were incorporated into European Union law by the Amsterdam Treaty, while providing opt-outs for the only two EU member states that had remained outside the Area: Ireland and the United Kingdom (which subsequently withdrew from the EU in 2020). Schengen is now a core part of EU law, and all EU member states without an opt-out which have not already joined the Schengen Area are legally obliged to do so when technical requirements have been met. Several non-EU countries are included in the area through special association agreements.
https://en.wikipedia.org/wiki/Schengen_Agreement