Happily, to find the mass number, all you need to do is round the atomic weight to the nearest whole number. In our example, krypton's mass number is 84 since its atomic weight, 83.80, rounds up to 84. The mass number is a count of the number of particles in an atom's nucleus.
Because examples of false dilemma, inconsistent premises, and begging the question are valid arguments in this sense, this definition misses some standard fallacies. Other researchers say a fallacy is a mistake in an argument that arises from something other than merely false premises.
It is only a fallacy to claim that an argument is wrong because of a negative attribute of someone making the argument. (i.e. âJohn is a jerk.â is not a fallacy. âJohn is wrong because he is a jerk.â is a logical fallacy.) The term âpoisoning the wellâ also refers to a form of ad hominem fallacy.