Latorre is a spanish physicist.
1 - "A clock is a physical phenomenon that gives us a reference cycle. The clock controls a periodic motion."
2 - "Time is a parameter that relates two movements."
3 - "We can not measure time, we count all the tics that are caused by something else."
4 - "From the conceptual point of view you can not watch time, but that time is the relation between two phenomena."
Note that physicists are very likely to use the operational definitions. This has its advantage because it allows other researchers to perform the same operations performed by an investigator. The disadvantage is that the scope of the operational definition is very limited.
I have said repeatedly that clocks measure time counting equal periods. We measure the duration of an event relating it to a clock. Physicists neither use the concept of duration, which is the interval between two moments. Let's remember that the formula of the psychological duratio is: pd = aex + t.
Un saludo.
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