1)
What does "Mashgeh Iver" entail?
1.
Rashi: Refer to Vayikra, 19:14:3:1.
2.
Seforno, Targum Onkelos and Targum Yonasan: Refer to Vayikra, 19:14:3:2.
3.
Targum Yonasan #2: It entails misleading a guest, who is akin to being blind (to his current environment).