Chomsky 2013 Eagle Examples
[Last updated: June 22nd 2026: sandiway.arizona.edu]
Sentences highlighted with a blue background are the eagle sentences
discussed directly in Chomsky's 2013 Problems of
Projection (POP) paper. Red text indicates the example is
ungrammatical.
The ones with a gray blackground
are variants or simpler sentences related to the blue ones.
[Click on any graph node to see parser derivations for a
sentence. There are 26 examples in this group.
Each step-by-step derivation can be viewed either as a full or
abbreviated derivation graph (top-down or left-to-right), or in
textual (indented) format. In each case, the relevant parse command
is given in the Run link.]
Chomsky 2013 p39.
g
[instinctively,,,eagles,that,fly,swim]
[instinctively,,,eagles,that,fly,swim]
[eagles,that,instinctively,fly,swim]
[eagles,that,instinctively,fly,swim]
[instinctively,,,eagles,that,fly,swim]->[eagles,that,instinctively,fly,swim]
[eagles,that,fly,instinctively,swim]
[eagles,that,fly,instinctively,swim]
[instinctively,,,eagles,that,fly,swim]->[eagles,that,fly,instinctively,swim]
[are,eagles,that,fly,swimming]
[are,eagles,that,fly,swimming]
[are,eagles,that,swimming,fly]
[are,eagles,that,swimming,fly]
[are,eagles,that,fly,swimming]->[are,eagles,that,swimming,fly]
[eagles,that,fly,are,swimming]
[eagles,that,fly,are,swimming]
[are,eagles,that,swimming,fly]->[eagles,that,fly,are,swimming]
[are,young,eagles,flying]
[are,young,eagles,flying]
[eagles,young,are,flying]
[eagles,young,are,flying]
[are,young,eagles,flying]->[eagles,young,are,flying]
[young,eagles,are,flying]
[young,eagles,are,flying]
[young,eagles,are,flying]->[are,young,eagles,flying]
[eagles,young,are,flying]->[young,eagles,are,flying]
[can,eagles,that,fly,swim]
[can,eagles,that,fly,swim]
[eagles,that,can,fly,swim]
[eagles,that,can,fly,swim]
[can,eagles,that,fly,swim]->[eagles,that,can,fly,swim]
[eagles,swim]
[eagles,swim]
[eagles,can,swim]
[eagles,can,swim]
[eagles,swim]->[eagles,can,swim]
[eagles,that,fly,swim]
[eagles,that,fly,swim]
[eagles,swim]->[eagles,that,fly,swim]
[eagles,are,swimming]
[eagles,are,swimming]
[eagles,swim]->[eagles,are,swimming]
[can,eagles,swim]
[can,eagles,swim]
[eagles,can,swim]->[can,eagles,swim]
[can,eagles,swim]->[eagles,can,swim]
[can,eagles,swim]->[eagles,that,can,fly,swim]
[eagles,that,fly,swim]->[eagles,that,can,fly,swim]
[eagles,that,fly,swim]->[eagles,that,instinctively,fly,swim]
[eagles,that,are,flying,swim]
[eagles,that,are,flying,swim]
[eagles,that,fly,swim]->[eagles,that,are,flying,swim]
[eagles,that,fly,can,swim]
[eagles,that,fly,can,swim]
[eagles,that,can,fly,swim]->[eagles,that,fly,can,swim]
[eagles,that,fly,can,swim]->[can,eagles,that,fly,swim]
[eagles,fly]
[eagles,fly]
[eagles,fly]->[eagles,that,fly,swim]
[eagles,instinctively,fly]
[eagles,instinctively,fly]
[eagles,fly]->[eagles,instinctively,fly]
[young,eagles,fly]
[young,eagles,fly]
[eagles,fly]->[young,eagles,fly]
[eagles,are,flying]
[eagles,are,flying]
[eagles,fly]->[eagles,are,flying]
[eagles,fly,instinctively]
[eagles,fly,instinctively]
[eagles,instinctively,fly]->[eagles,fly,instinctively]
[instinctively,,,eagles,fly]
[instinctively,,,eagles,fly]
[eagles,fly,instinctively]->[instinctively,,,eagles,fly]
[instinctively,,,eagles,fly]->[eagles,instinctively,fly]
[instinctively,,,eagles,fly]->[eagles,that,instinctively,fly,swim]
[eagles,that,fly,swim,instinctively]
[eagles,that,fly,swim,instinctively]
[eagles,that,instinctively,fly,swim]->[eagles,that,fly,swim,instinctively]
[eagles,that,fly,swim,instinctively]->[eagles,that,fly,instinctively,swim]
[eagles,that,fly,instinctively,swim]->[instinctively,,,eagles,that,fly,swim]
[are,eagles,swimming]
[are,eagles,swimming]
[eagles,are,swimming]->[are,eagles,swimming]
[are,eagles,swimming]->[eagles,are,swimming]
[are,eagles,swimming]->[eagles,that,fly,are,swimming]
[eagles,that,fly,are,swimming]->[are,eagles,that,fly,swimming]
[young,eagles,fly]->[young,eagles,are,flying]
[eagles,are,flying]->[young,eagles,are,flying]
[eagles,are,flying]->[eagles,that,are,flying,swim]
Chomsky 2013 p43.
