(1) it is not being presented for any improper purpose, such as to harass

or to cause unnecessary delay or needless increase in the cost of litigation; (2) the claims, defenses, and other legal contentions therein are war- ranted by existing law or by a non-frivolous argument for the extension, modification, or reversal of existing law or the establishment of new law; (3) the allegations and other factual contentions have evidentiary support or, if specifically so identified, are likely to have evidentiary support after a reasonable opportunity for further investigation or discovery; and (4) the denials of factual contentions are warranted on the evidence or, if specifically so identified, are reasonably based on a lack of information or belief. History: Amended November 6, 2012, effective Janu- ary 1, 2013; amended January 8, 2014, effective April 1, 2014.