This is a very reliable way if you keep calm when talking to the people.
Even so, there was no reliable way to lower high blood pressure until the 1940s.
This is much more difficult and has only recently become possible to do in any reliable or available way.
"The only reliable way to get good security is to take time and look at this technology closely."
"Real estate is really the only reliable way to make money in this town."
As yet, there is no reliable way to tell the age of a lobster.
This also means there is no reliable way to find out.
Keep in mind these are not reliable ways to end pregnancy.
I'm not sure how such a projection can be in any way reliable.
There are, after all, so few reliable ways to turn back the clock.