Couldn't you just add them?
Var1+Var2+Var3+Var4+Var5+Var6+Var7+Var8 is greater or equal to 3
Very nice! That is probably the best solution.
Heptagono, since you have booleans, you could either change them to numbers with 0 and 1, or you can use the ternary operator, `?`.
Ex: (var1)1:0
That says if var1 is true, return 1. And if var1 is false, then return 0.