關鍵論據
https://www.hklii.hk/cgi-bin/sinodisp/eng/hk/cases/hkcfa/2014/40.html
Falcon Private Bank Ltd v. Borry Bernard Edouard Charles Ltd and Another (13/05/2014, FAMV49/2013) (2014) 17 HKCFAR 281, para. 36
36. Of course, if a judge makes criticisms without any discernible rhyme or reason or which are obviously unfair and unreasonable, this might be factored into what the fair-minded and informed observer might apprehend in terms of apparent bias. Conversely, if the criticisms appear capable of being justified, any appellate court would be slow to conclude from the mere fact of such criticisms, that the fair-minded and informed observer would apprehend a risk of bias. But even if the criticisms are or may be justified, if they are couched in terms or made in a context which raise doubts as to whether the judge can continue to adjudicate with the detachment and impartiality essential to the judicial process, his recusal may be properly required.