Editing Minimalist program (section)

=== Agree ===
Starting in the early 2000s, attention turned from feature-checking as a condition on movement to feature-checking as a condition on agreement. This line of inquiry was initiated in Chomsky (2000), and formulated as follows:

::Agree: α can agree with β if and only if:
:::(a) α carries at least one unvalued and uninterpretable feature and
::::β carries a matching interpretable and valued feature
:::(b) α c-commands β
:::(c) β is the closest goal to α
:::(d) β bears an unvalued uninterpretable feature (from Zeijlstra 2012)

Many recent analyses assume that Agree is a basic operation, on par with Merge and Move. This is currently a very active area of research, and there remain numerous open questions:<ref>{{Cite book|last1=Smith|first1=Peter W.|title=Agree to Agree: Agreement in the Minimalist Programme|last2=Mursell|first2=Johannes|last3=Hartmann|first3=Katharina|chapter=Some remarks on agreement within the Minimalist Programme |publisher=Language Science Press|year=2020|editor-last=Smith|editor-first=Peter W.|publication-place=Berlin|pages=1–29|doi=10.5281/zenodo.3541743|isbn=9783961102143 |editor-last2=Mursell|editor-first2=Johannes|editor-last3=Hartmann|editor-first3=Katharina}}</ref>

# Is Agree a primitive operation?
# What is the "direction" of the Agree relation: does it apply top-down, bottom-up, or both?
# Is Agree a syntactic operation, a post-syntactic operation that applies at PF, or both?
# Is the Agree relation restricted to certain feature types?
# Is the Agree relation subject to locality restrictions?
# Which phenomena are best modelled by the Agree relation?
# Is the Agree relation conditioned by other factors, or does it apply freely?
# How does Agree interact with other operations such as Merge and Label?

Co-indexation as feature checking: co-indexation markers such as {k, m, o, etc.}<ref name="sportiche2014" />
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