Definition of opinion:
		
	
		
			
	
		
		
		(v) :
		
		to have or express as an opinion
		
								
				"1658: But if (as some opinion) King Ahasuerus were Artaxerxes Mnemon [...], our magnified Cyrus was his second Brother  Sir Thomas Browne, The Graden of Cyrus (Folio Society 2007, p. 166)"