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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_verified_or_verifiable(analysis):
 """Returns whether the analysis is verifiable or has already been verified """

    if IVerified.providedBy(analysis):
        return True
    if wf.isTransitionAllowed(analysis, "verify"):
        return True
    if wf.isTransitionAllowed(analysis, "multi_verify"):
        return True
    return False