If atheists are so positive that there is no God, where is their proof that He does not exist?

Read also:

• Why do most atheists in debates with theists take Bible verses out of context much of the time? Are they lying maliciously or do they not understand theology enough to understand the meaning?
• What are some difficulties in a JEE aspirant's life?
• What will help me to get a bigger butt naturally?
• How do I find a luxury service apartment in Gurgaon?
• Should parents force their kids to go to school when they are sick?
• Why is Canada letting too many Indians in Canada?
• What makes girls masturbate?
• What's an uncomfortable truth you've learned to accept?
• What do you think of Hegseth calling The Atlantic journalist Jeffrey Goldberg, "a deceitful and highly discredited so-called journalist who has made a profession of peddling hoaxes” after team Trump texted him their top-secret war plans on Yemen?
• Have you ever had a weird experience immediately following the death of a loved one that made you think there is an afterlife and that the deceased person was communicating with you?
• How do I convince flat earthers that the earth is round?