______________________________________@Norwin , @Alex M is referring to two types of ebikes:
Cadence-sensing: gives you help every time you pedal, not matter how softly. You decide how much help to receive by picking the setting. For example, on recent versions of the bike I have, PAS ("pedal assist") 1 goes up to 8mph, PAS 2 up to 11mph, PAS 3 up to 14mph, PAS 4 up to 17mph, and PAS 5 up to 20mph. When you start riding, you pick PAS 1, if you want just a bit of help. Once you get to 8mph, the PAS stops helping. If you drop below 8mph, it helps again. It does this just because it senses pedaling and speed. It doesn't matter how hard you pedal. If you want to go faster than 8mph, you can keep it on PAS 1 and pedal harder. Or, if you want the bike to assist you to get to a higher speed, you can pick PAS 2. You don't have to use the PAS settings in order. The higher PAS the more acceleration you will experience. To have good balance, for a beginner I'd recommend starting on PAS 1 and going up one by one, to get used to the feeling.
Torque-sensing: the bike gives you help based upon how hard you pedal. If you pedal softly, you only get a little help. The harder you pedal, the more the bike helps. Some say this has a more natural feeling than cadence-sensing. But, it requires a higher level of physical fitness.
A physically fit person can get a lot out of either a cadence-sensing OR a torque-sensing bike, because with either you control how much help you are getting. If someone has stamina issues, joint issues, heart problems, or anything else that means pedaling harder can be a problem, either always or intermittantly, then a cadence-sensing bike might be a better fit for that person.
What @Alex M is saying is that if someone doesn't have the stamina to pedal very hard, they won't get much help from a torque-sensing bicycle.
A final example: Let's say the rider is tired and pedaling softly, but wants to get home in a timely manner. On a cadence-sensing bike, they just put the PAS on a higher level, and by continuing to pedal softly (what someone may have called "clown pedaling" even--pedaling without getting any "bite" with the gears, but feet moving nonetheless), they can get home at a reasonable clip.
Does this all make any sense?
BTW, I enjoy my cadence-sensing bike. I'm in my 50's and have no health problems, but found riding a conventional bike in our very hilly terrain to be a lot of work and not a lot of fun. I love my ebike. Commuted 25 miles today, mostly on PAS 3, which on my bike takes me up to a bit over 17mph.
Wow, what a wonderful explanation. And, description.
And, it's only taken six or seven pages of these replies to have such a concise explanation.
We men just think everyone knows what we know. Or, they should, huh!
Yes, thank you.
Norwin