According to Paul Grewal, 'force majeure' is a legal doctrine that protects parties from unforeseeable events that prevent contract fulfillment, but it does not apply if a party claims they were never allowed to enter the contract in the first place. This distinction highlights the importance of clear contract terms and legal compliance for crypto traders, as improper use of force majeure can affect the enforceability of agreements and increase counterparty risk in crypto markets (source: @iampaulgrewal).