[NTG-context] Force an indent

[David Arnold]

All,

How can I force an indent on my last paragraph? My attempt below does  
not work. I don't really want to redefine any setups, I just want an  
indent this one time.

%output=pdf

\starttext

Again, we choose to multiply the fours, then the result by the square  
root of three. That is,

\placeformula[-]
\startformula
   4(4\sqrt3)
   =16\sqrt3.
\stopformula

\indent By induction, we can argue that that the associative and  
commutative properties will allows us to group and arrange the  
product of more than three numbers in any order that we please.

\stoptext