Unfortunately, science has not been questioning the shape of the Earth for quite a while. So, flat Earth is not an attack on science. Most science assumes the Earth is a Globe, and uses that assumption in scientific interpretation. Which is logical, since our military institutions, such as NASA say it is, why would they lie?

Remember, the 'fake' moon landings were not science, they were military stunts. Even if they did actually occur (they didn't), no major science actually took place. It was a Cold War stunt. 

Science is the cornerstone of the flat earth movement. Using it's process, we know the Earth IS flat. Lasers have already been used to absolutely prove this time and time again: 
https://www.youtube.com/watch?v=GBhDFO4NMrw 

Lastly, everything we observe today has a valid interpretation in the flat or globe model. It is important to realize this. Also, the flat model changes a lot more than just the shape of the Earth, so don't think you can debunk it until you understand it.