Allow me to offer the following for those who have never experienced the agony of studying logic:
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corollary /kôr′ə-lĕr″ē, kŏr′-/
noun
A proposition that follows with little or no proof required from one already proven.
A deduction or an inference.
A natural consequence or effect; a result.
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That being said, allow me to offer a proposition:
The best method of finding a thing lost is to purchase its replacement

I won't belabor the evidence on which that proposition is based. Suffice it to say that my evidence is based on 81 years of experiencing it. Others may disagree. (There are those on RP who will as soon as they see who posted this.)

The corollary to this proposition is that whatever you have purchased to replace the thing lost will be lost as soon as the first thing is found.

Case in point: I recently had need of a multimeter. No, I'm not an electrician nor an electronics expert. I merely needed one to complete a household chore. I knew I had one. I had purchased it to replace another one that had been lost on a similar occasion. After a few hours of futile search, I purchased its replacement and, shortly after the replacement arrived, the lost multimeter was found (as I knew it would be). I was tempted to toss the old one in the certainty that the batteries were dead and replacement batteries would likely cost more than the multimeter originally cost. (Button batteries) As luck would have it, I had a supply at hand and replaced the batteries.

While replacing the batteries, the replacement multimeter became lost.

Now, those who love belaboring me with ad hominem attacks will complain that this proves nothing other than the fact that I'm an idiot as they've oft asserted, and that my proposition and corollary are thus flawed. Maybe so.

Just for yuks, let me know if you've experienced anything similar.

For those who think I'm an idiot, at least you've had an introduction to logic. I hope it helps you better understand problems and argue more effectively.