"Every contract negotiator has been lied to by someone or other,"
P1: CN ==> L2BS not L2BS ==> not CN
"whoever lies to anyone is practicing deception."
P2: L2S ==> PD not PD ==> not L2S
"anyone who has been lied to has also lied to someone or other."
P3: L2BS ==> L2S not L2S ==> not L2BS
So, we can connect P1 to P3 to P2 like so: CN ==> L2BS ==> L2S ==> PD to conclude through the transitive property that CN ==> PD, i.e. if one is a contract negotiator, then they have practiced deception, i.e. answer choice (A): "Every contract negotiator has practiced deception."
Hope that was helpful! Please let us know if you have any other questions!
