<span><font color="#0000ff" face="Arial" size="2">> Or would a local bet din not give psak if it weren't 100%
sure? <<br>To my understanding, one of the few mitzvot in the Torah that never had to be enforced is that of a Zakein who refused to change his psak to match with the Sanhedrin. After being warned numerous times he would eventually be chayav mita.
<br>This seems to suggest that Rabbanim do have some autonomy with their halachik decisions until the Sanhedrin unify.<br><br>~Liron</font></span><br>