logical force
the measure of how strong a proposition is - how strong/weak a statement is
types of logical force
modality, quantification
weak modality
-possibility - just above 0% chance something is true -terms: may, could, might, can, occasionally
moderate modality
- probability - more than 50% chance - terms: probably, likely, usually
strong modality
- necessity - 100% chance - terms: will, must, definitely, always, is/are, do/does, necessarily
how many modality categories are there?
3
modality
how certain we are something will occur
quantification
how many things have a certain quality
how many quantification categories are there?
3
weak quantification
- possibility - at least 1 -terms: some, a few, several, many, a significant number
moderate quantification
-probability -more than half -terms: most, majority, over half
strong quantification
-necessity -100% -terms: all, any, each, every
conclusions
conclusions can be supported only by premises of equal or greater strength; conclusion cannot be stronger than the premises
modality
how certain is that something will occur
quantification
how many things have a certain quality