Why can you not trust others, or their supposed experiences? It is impossible to know whether they’re telling the truth, or even whether they have the facts right.

For example, what if Lance Armstrong was truly 100% ignorant of the performance enhancing stuff which was happening to him?

Or as a thought experiment, imagine if there is a world record power lifter, and his personal trainer was secretly injecting him with steroids and hormones in his diet, without the athlete knowing? And that athlete genuinely 100% believed that he was all natural? Therefore if somebody asked him whether he was “all natural“, and he said yes I am 100% all natural, he would be telling the truth, ignorant of the fact what his personal trainer was doing to him in his sleep.

My personal curiosity with physical strength, and bodybuilding

It is impossible to know what is physically possible, when it comes to the strength or the muscle or the physique of other bodies. All you could trust is yourself, because you know with 100% certainty what you do to yourself.

For example, impossible to know with 100% certainty whether the other guys in the gym are on the “juice” or not. And instead of wasting time, or mental bandwidth on doing research online about what is “natty” (natural) or not, just focus on yourself.