Measuring these is a problem since they lack clear boundaries.

There is no such thing as a clear boundary, at least between neighbors.

But most terms in this general realm still lack clear boundaries.

But there are no clear boundaries between one color and the next.

The law has not been helpful in setting clear boundaries.

You need to establish a clear boundary - no matter what the future holds.

It is a market economy with clear boundaries and free trade that creates prosperity.

However, our effort and enthusiasm for regulation should have clear boundaries.

There were clear boundaries and I didn't want them breached.

That seems a clear moral and legal boundary to me.