Earlier we told you how rapper B.o.B had gone full-on conspiracy theorist on Twitter, trying to convince everyone that the Earth is actually flat and that the government has been lying to us since forever about it (for whatever reason).

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Here’s a reminder of what B.o.B was Tweeting alongside some other paranoid nonsense he’s into:

https://twitter.com/bobatl/status/691411463051804676?ref_src=twsrc%5Etfw

Jet Fuel Does Not Melt Steel Beams

— B.o.B +1 404-236-6129 (@bobatl) September 11, 2015

https://twitter.com/bobatl/status/691636965448507392?ref_src=twsrc%5Etfw

I think a modern day moon landing would expose too many inconsistencies with the last one, #whywehaventgoneback https://t.co/6M93snXw1E

— B.o.B +1 404-236-6129 (@bobatl) January 12, 2016

https://twitter.com/bobatl/status/673670576381165568?ref_src=twsrc%5Etfw

https://twitter.com/bobatl/status/685377522523975680?ref_src=twsrc%5Etfw

So yeah, we’ve all heard the 9/11 and moon landing conspiracies a million times before. Not even going to bother talking about this celebrity cloning centre he’s going about. But what really blows my mind is there’s actually people out there in 2016 who believe the world is flat. B.o.B. backed up his beliefs with these screenshots he took from a book:

https://twitter.com/bobatl/status/691630923851436033?ref_src=twsrc%5Etfw

https://twitter.com/bobatl/status/691625973125627905?ref_src=twsrc%5Etfw

https://twitter.com/bobatl/status/691514326646022144?ref_src=twsrc%5Etfw

Things were getting a bit silly so Neil deGrasse Tyson got involved to shut this clown down:

@bobatl Earth's curve indeed blocks 150 (not 170) ft of Manhattan. But most buildings in midtown are waaay taller than that.

— Neil deGrasse Tyson (@neiltyson) January 25, 2016

@bobatl Polaris is gone by 1.5 deg S. Latitude. You’ve never been south of Earth’s Equator, or if so, you've never looked up.

— Neil deGrasse Tyson (@neiltyson) January 25, 2016

B.o.B. responded in classic truther fashion:

if my tweets are rattling the tiny little cages of your reality … the unfollow button is right there

— B.o.B +1 404-236-6129 (@bobatl) January 23, 2016

Tyson then pretty much summed it up:

@bobatl Duude — to be clear: Being five centuries regressed in your reasoning doesn’t mean we all can’t still like your music

— Neil deGrasse Tyson (@neiltyson) January 25, 2016

@bobatl Flat Earth is a problem only when people in charge think that way. No law stops you from regressively basking in it.

— Neil deGrasse Tyson (@neiltyson) January 25, 2016

I’ll give B.o.B. this – he’s thinking critically and asking questions which is something that can only be commended. The problem is he seems to have gone all-in with this belief that the world is flat so he’s not trying to hear anything anyone tells him that proves otherwise, even if it’s coming from one of the smartest men in the world.

Don’t waste your time Neil – you’ve still got to answer that 6-year-old’s question about the meaning of life.