“Half-safe” is a silly carry over from the old world. The safeties, less the firing pin block safety in the case of the Ruger’s, all still function when these 3 position safeties are in the middle position.

Mechanically, there is no such thing as “half safe.” The rifles can’t “half fire”. The safeties remain engaged when in the middle position. Simply the physical bolt locks, typically a pin locking the bolt body to the receiver, or the bolt shroud in the case of Ruger’s. The Ruger safety lever does act as a firing pin block safety, while most of the others are simply bolt locks, with no additional security against firing with the safety engaged. Rather, in most designs, the “safe, half safe, and fire” jargon of the past is debunked by a mechanical description which prescribes “locked, safe, and fire,” as the only mechanical change in the final, 3rd position is the bolt lock, not any additional safety mechanism.

But the fact remains - firearm designs in which the safety must be disengaged to cycle the bolt, meaning the rifle will freely fire if a careless finger bumps the trigger while quickly cycling rounds to clear the rifle, are the exception, not the rule. As noted, even several rifle models which used to require the safety be disengaged to cycle the bolt have been modified in modern incarnations to allow the safety to remain engaged during administrative manipulation.