deliberate political intention to impede the war effort, it might be possible to base on such information an order of detention under Regulation 18B; but it would be extremely difficult to differentiate the activities of such an individual from the activities of a trade union local secretary or the leader of an unofficial strike committee who was fomenting a strike in connection with some industrial dispute and was innocent of any deliberate intention to impede the prosecution of the war. If a Trotskyist who had taken a minor part in a strike movement were detained under Regulation 18B, the question would no doubt be raised why similar action was not taken against some more influential strike leader: and it would be an unsatisfactory explanation to say that the first individual had been detained because he had been animated by the political motive of deliberately intending to impede the war effort and the second though in fact causing more harm than the first had been animated by no such motive.