Two types of compulsions . . .

"To the extent to which persons let their actions be guided by reasons, they
submit themselves to the logical-semantic and broadly ‘grammatical’ commitments of
intersubjectively shared systems of rules that are not up to them. At the same time, these rules do not ‘compel’ in the same way that laws of nature do." (Language Game of Responsible agency, p. 17, italics in the original).