2. XOR A
OUT B
A or B
but never both

3. MARK 2:18 Now John’s disciples and the Pharisees were fasting
MARK 2:18 Now John’s disciples and the Pharisees were fasting. Some people came and asked Jesus, “How is it that John’s disciples and the disciples of the Pharisees are fasting, but yours are not?”
2 Samuel 1:12 They mourned and wept and fasted till evening for Saul and his son Jonathan, and for the army of the Lord and for the nation of Israel, because they had fallen by the sword.
1 Kings 21:27 When Ahab heard these words, he tore his clothes, put on sackcloth and fasted. He lay in sackcloth and went around meekly.
Esther 4:16 “Go, gather together all the Jews who are in Susa, and fast for me. Do not eat or drink for three days, night or day.

4. MARK 2:18 Now John’s disciples and the Pharisees were fasting
MARK 2:18 Now John’s disciples and the Pharisees were fasting. Some people came and asked Jesus, “How is it that John’s disciples and the disciples of the Pharisees are fasting, but yours are not?”
Luke 18:  The Pharisee stood by himself and prayed: ‘God, I thank you that I am not like other people—robbers, evildoers, adulterers—or even like this tax collector. 12 I fast twice a week and give a tenth of all I get.’
Matthew 6:16 16 “When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show others they are fasting. Truly I tell you, they have received their reward in full. 

5. MARK 2:19 Jesus answered, “How can the guests of the bridegroom fast while he is with them? They cannot, so long as they have him with them. 20 But the time will come when the bridegroom will be taken from them, and on that day they will fast.
Isaiah 58:6-7
6 “Is not this the kind of fasting I have chosen: to loose the chains of injustice     and untie the cords of the yoke, to set the oppressed free     and break every yoke? 7 Is it not to share your food with the hungry     and to provide the poor wanderer with shelter— when you see the naked, to clothe them,     and not to turn away from your own flesh and blood?

6. MARK 2:21 “No one sews a patch of unshrunk cloth on an old garment
MARK 2:21 “No one sews a patch of unshrunk cloth on an old garment. Otherwise, the new piece will pull away from the old, making the tear worse. 22 And no one pours new wine into old wineskins. Otherwise, the wine will burst the skins, and both the wine and the wineskins will be ruined. No, they pour new wine into new wineskins.
Matthew 5:17-18
17 “Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. 18 For truly I tell you, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished.

7. MARK 2:21 “No one sews a patch of unshrunk cloth on an old garment
MARK 2:21 “No one sews a patch of unshrunk cloth on an old garment. Otherwise, the new piece will pull away from the old, making the tear worse. 22 And no one pours new wine into old wineskins. Otherwise, the wine will burst the skins, and both the wine and the wineskins will be ruined. No, they pour new wine into new wineskins.
John 15:15 I no longer call you servants, because a servant does not know his master’s business. Instead, I have called you friends, for everything that I learned from my Father I have made known to you.
Galatians 2:3-5 Yet not even Titus, who was with me, was compelled to be circumcised, even though he was a Greek. 4 This matter arose because some false believers had infiltrated our ranks to spy on the freedom we have in Christ Jesus and to make us slaves. 5 We did not give in to them for a moment, so that the truth of the gospel might be preserved for you.