Will Thorne Staff Writer“Tough As Nails” proved on Wednesday night that its title is well earned, at least in ratings terms.After dipping to a 0.4 rating among adults 18-49 for the previous couple episodes, the CBS competition show bounced back up to a 0.5 rating and 3.5 million viewers this time around. Replays of “The Price is Right: Big Brother” and “SEAL Team” followed it up with a 0.4 and a 0.3 respectively.