Sentence examples similar to it's effective exclusively when from inspiring English sources

It is effective only when the samples are evenly distributed.

It's effective".

It's effective, really.

But it's effective".

It is effective when the quotient is ten times higher.

When my e-fag works, it is effective.

It is effective, though.

"It was effective".

"But it was effective".

Would it be effective?

Will it be effective?