Hi there,

I've got a text excerpt here and I'm wondering whether the modal "must" has epistemic or deontic meaning. What do you think? (it's from the end of the 17th century)

For understanding of this, let us suppose the quadrat

space E, to be filled with a piece of Lead or Iron. I

say then it

the quadrat foot of Water I, is more pressed then the

quadrat foot of Water K. To illustrat this, let us suppose

that each quadrat foot of this Water weights a pound,

and that the heavy body existing in E, weights two

pound. If this be, the foot of Water I,

it is more prest then K: upon the same account

the Water N yeeld, and give way to the Stone, seeing

it is more prest then R. For according to the twelfth

Theorem, (^There cannot be unequal Pressure upon a surface,

unless motion follow^) .

For understanding the second part, let us suppose the

space R, to be filled with a piece of Cork, that is #

specifically

or naturally lighter then Water. I say then, it

quadrat foot of Water K, is more prest upward, then the

quadrat foot of Water I, or L is: but this cannot be in

Fluid bodies, unless motion follow thereupon. I say, it

is more prest up, because R being lighter then N, or S,

it

upon L, or N upon I. It is still to be remembred,

(^That Fluids presseth with as much strength upward, as #

downward^) ,

according to the sixth Theorem; and that an Horizontal

surface doth as really suffer unequal Pressure from

below, as from above.

In my opinion it doesn't express obligation but rather an assumption of the speaker. But is it really epistemic?

I've got a text excerpt here and I'm wondering whether the modal "must" has epistemic or deontic meaning. What do you think? (it's from the end of the 17th century)

For understanding of this, let us suppose the quadrat

space E, to be filled with a piece of Lead or Iron. I

say then it

**must**go down to I; and the reason is, becausethe quadrat foot of Water I, is more pressed then the

quadrat foot of Water K. To illustrat this, let us suppose

that each quadrat foot of this Water weights a pound,

and that the heavy body existing in E, weights two

pound. If this be, the foot of Water I,

**must**yeeld, seeingit is more prest then K: upon the same account

**must**the Water N yeeld, and give way to the Stone, seeing

it is more prest then R. For according to the twelfth

Theorem, (^There cannot be unequal Pressure upon a surface,

unless motion follow^) .

For understanding the second part, let us suppose the

space R, to be filled with a piece of Cork, that is #

specifically

or naturally lighter then Water. I say then, it

**must**ascend to the top B; and the reason is, because thequadrat foot of Water K, is more prest upward, then the

quadrat foot of Water I, or L is: but this cannot be in

Fluid bodies, unless motion follow thereupon. I say, it

is more prest up, because R being lighter then N, or S,

it

**must**press with greater force upon K, then S can doupon L, or N upon I. It is still to be remembred,

(^That Fluids presseth with as much strength upward, as #

downward^) ,

according to the sixth Theorem; and that an Horizontal

surface doth as really suffer unequal Pressure from

below, as from above.

In my opinion it doesn't express obligation but rather an assumption of the speaker. But is it really epistemic?

Comments

It is epistemic. You cannot oblige physical reactions to occur.

.

Mister MicawberWhen comes thunder, then rain must follow.Deontic modality also refers to things which are

seen to becompelled to act.anonymousanonymous"for fra time a man by euill doing, hes banished knowledge out of the minde, and feeling out of the hart quhat can remaine there, bot a blinde feare. Quhen men hes put out all light, and lefte nathing in thair nature, but darknes; there can nathing remaine, but a blind feare."anonymousYou can say just anything you like, actually.

John will always belch at the dinner table.

Romanian immigrants must steal. It's in their nature.

The next US president will be a good man.

He must nedys go that the deuell dryues.

It's all modalised opinion.

anonymousDynamic.

anonymousCJ

CalifJimanonymous