I can't thank you enough, Mr. Fruhling, for the relief this video brought me. Sometimes it's easy to miss how ecstatic students feel when they understand a concept! Every lesson that builds up to mastery of a subject is essential. I deeply appreciate the way you stay friendly and thoughtful when you teach. I'll try to hold on to that as I begin student teaching.
Thank you, Gary! I've been privileged to make a real difference in logic education, both through my work at Aplia creating educational materials for logic and in my own content creation and classroom teaching work. I try to make sure that even my free content is better than most companies' paid content! I hope you'll visit my website, if you haven't already done so. There's a ton of philosophy content on there to explore. www.zacharyfruhling.com - Thanks again, Gary, and don't hesitate to reach out if you have any questions on logic in particular or philosophy in general!
I was stuck on this for 3 weeks, but thanks to you going over everything step by step, I finally understood how natural deduction works. You absolute mad lad 🙏 P.s This is for computer science at uni
The day we did "Natural Deduction/Rules of Implication I", I walked out of Logic class truly lost. After this video I'm cranking out the answers like a boss, and I completely understand it! :-D
Hi Denny! I’m so glad that this video helped. Be sure to check out the other videos in the series as your logic class goes on. And don’t be afraid to drop me a line if I can be helpful.
I’m so glad this was helpful! Be sure to check out my other videos on subsequent chapters and assignments, and don’t hesitate to contact me with any questions!
Thankk youu very much!!! I thought this was really scary but you made it so simpleee and easy to understand. At first I was really just noting every example but at the near end, I try to answer it on my own first before I continue the video to see if I was correct. And I am!! Thank youu very much, really.
I'm so glad that this was helpful! Be sure to check out other videos in this natural deduction series, especially if you get stuck at any point and you work through your course. Let me know if you have any questions!
No, if you have B v ~K and you also have ~K, you can't conclude anything from that. (That's not entirely true, actually. You could use the Addition rule to conclude something like (B v ~K) v A, or something like ~K v A. But you know nothing about the truth or falsity of B from the fact that K is false (i.e., ~K is true).
Hi sir. Im really confused with this one. I've been trying to solve this one but i can't find the correct answer. 1. (B v N) -> (K^L) 2. ~K 3. ~M /~B^~M i hope you'll take your time to answer this one.
@@wendelmaglinte9749 Get ~K v ~L by addition. Then use De Morgan's Rule to get ~(K ^ L). Then get ~(B v N) by Modus Tollens. Then get ~B ^ ~N by De Morgan's Rule. Then get ~B by simplification. Finally, get ~B ^ ~M by conjunction. I hope that helps!
I almost teared up when it finally clicked in my brain. This video helped me really understand the subject. Thank you so much Mr. Fruhling!
I can't thank you enough, Mr. Fruhling, for the relief this video brought me. Sometimes it's easy to miss how ecstatic students feel when they understand a concept! Every lesson that builds up to mastery of a subject is essential. I deeply appreciate the way you stay friendly and thoughtful when you teach. I'll try to hold on to that as I begin student teaching.
This is by far the best channel I've come across to teach the student introductory logic. Thx.
Thank you, Gary! I've been privileged to make a real difference in logic education, both through my work at Aplia creating educational materials for logic and in my own content creation and classroom teaching work. I try to make sure that even my free content is better than most companies' paid content! I hope you'll visit my website, if you haven't already done so. There's a ton of philosophy content on there to explore. www.zacharyfruhling.com - Thanks again, Gary, and don't hesitate to reach out if you have any questions on logic in particular or philosophy in general!
I fully agree. Straight to the point.
I was stuck on this for 3 weeks, but thanks to you going over everything step by step, I finally understood how natural deduction works. You absolute mad lad 🙏
P.s This is for computer science at uni
The day we did "Natural Deduction/Rules of Implication I", I walked out of Logic class truly lost. After this video I'm cranking out the answers like a boss, and I completely understand it! :-D
Hi Denny! I’m so glad that this video helped. Be sure to check out the other videos in the series as your logic class goes on. And don’t be afraid to drop me a line if I can be helpful.
So clear and complete explanations, thank you a lot
Thank you Zach!!! May God bless you!
You're very welcome! I hope these logic videos are helpful! 🙂
Dear sir, could you let me know which textbook you are using.
This course used "A Concise Introduction to Logic" by Hurley/Watson: amzn.to/3AK02ad
@@zfruhling Thank you so much. I will get the book and follow your, truly excellent tutorials/lectures.
I hope u r my logic teacher. My instructor just hand out modules then that's it.
You're a LIFE SAVER thank you so much
I’m so glad this was helpful! Be sure to check out my other videos on subsequent chapters and assignments, and don’t hesitate to contact me with any questions!
Hi!
For number 5, I took a different route to get to the conclusion P.
4. 1,3 MP
5. 2,4 MP
6. 3,5 MP
7. 4,6MP
Does this add up or am I wrong?
omg this is actually FUN! thank you
I’m so glad you found the video helpful!
Thankk youu very much!!! I thought this was really scary but you made it so simpleee and easy to understand. At first I was really just noting every example but at the near end, I try to answer it on my own first before I continue the video to see if I was correct. And I am!! Thank youu very much, really.
I'm so glad that this was helpful! Be sure to check out other videos in this natural deduction series, especially if you get stuck at any point and you work through your course. Let me know if you have any questions!
Thank you so much for this !
thanks that was so helpful :)
1. B v ~k 2.~k is that deductible? What will be the result if it is.?
No, if you have B v ~K and you also have ~K, you can't conclude anything from that. (That's not entirely true, actually. You could use the Addition rule to conclude something like (B v ~K) v A, or something like ~K v A. But you know nothing about the truth or falsity of B from the fact that K is false (i.e., ~K is true).
Hi sir. Im really confused with this one. I've been trying to solve this one but i can't find the correct answer. 1. (B v N) -> (K^L) 2. ~K 3. ~M /~B^~M i hope you'll take your time to answer this one.
@@wendelmaglinte9749 Get ~K v ~L by addition. Then use De Morgan's Rule to get ~(K ^ L). Then get ~(B v N) by Modus Tollens. Then get ~B ^ ~N by De Morgan's Rule. Then get ~B by simplification. Finally, get ~B ^ ~M by conjunction. I hope that helps!
thank you so so so much
👍💞