There aren’t many positions in Brazilian Jiu-Jitsu that are equally dangerous (offensively and defensively) for both athletes… But 50/50 is one of such positions for sure – as both practitioners have equal chances of success and failure.
Which is why you should learn how to play the 50/50 position in such a way that you’re at an advantage against the other side.
Jeff Glover shows what he believes to be the best way to play 50/50 in Jiu-Jitsu:
Sloth Jiu-Jitsu: you can be slow and unathletic and still kick butt in Jiu-Jitsu.