By Sam Laskaris Writer Rebels undefeated streak snapped It was fun while it lasted. And it lasted a rather long time. But the Six Nations Rebels finally tasted defeat on Sunday, for the first time this season. The local Junior B lacrosse squad had posted a perfect 20-0-0 regular season mark. The Rebels then swept the Owen Sound North Stars 3-0 in their best-of-five, opening-round playoff series. Six Nations then downed the visiting Guelph Regals 15-8 in Game 1 of their best-of-five Western Conference semi-finals on Saturday. The Regals, however, bounced back with an 8-7 home victory on Sunday, evening the series at 1-1 and also snapping the Rebels’ 24-game undefeated streak. Six Nations will host Game 3 this Friday at the Iroquois Lacrosse Arena. The opening faceoff is scheduled…