A Brief History of Timelessness - Matt Welcome.

∆ reasonable cause for assuming Time

To initially even assume that any particular thing exists, we should have an initial reason to suspect this thing exists, and then also have a reasonable set of observations and thinking to support our suspicion or assumption.

with gravity for example...

we release an object , it 'falls'.
this happens with remarkable consistency seemingly everywhere.
we look at light from the distant galaxies, it shows an attractive force seems to operate everywhere we can check
so we have a good reason to suspect a thing, 'gravity', exists, and so it makes sense to further explore and define it.

but with 'time'...

we observe things moving and interacting.
as objects around us move and interact we can call these interactions 'events'.
as objects move and interact they leave a record of their motion in their physical surroundings
as we personally 'see' events the contents of our minds also change, forming, what we call, 'memories'.

But, if we think 'the changing contents of our own minds', are a reason to presume that extra to what we directly observe, (matter existing an interacting 'now'), a thing called "Time" also exists we may be very much mistaken. Becasue, we are assuming that a 'record of all events' is created and stored not just in the world around us, and our minds, but also as another mysterious and invisible 'third record'. an intangible record, apparently stored in a 'temporal past' - which is part of an incomprehensible 'fourth dimension'.

This can be seen as very bad reasoning, becasue we are presuming the existence of something that is in no way observed, and is in no way shown to have any effect or purpose in the world around us. And just becasue a large number of people may have jumped to the same assumption, this does not make it logically or scientifically correct.