S1: "Kakabili ko lang ng iPhone 14."
S2: "May bago akong cellphone."
Why? Since an iPhone is a type of cellphone, if S1 is true, S2 MUST be true.
S1: "Nasa UP Diliman ako."
S2: "Nasa bahay ako sa province."
Why? You cannot be in two different places at the exact same time.
S1: "Nag-aaral ako ng Python."
S2: "Umiinom ako ng kape."
Why? You can study Python with OR without coffee. S1 doesn't prove or disprove S2.