I can remember this table
$$\begin{array}{ccc}\ \psi&\phi&\psi\Rightarrow\phi\ \text{____}&\text{____}&\text{____}\t&t&t\ t&f&f\ f&t&t\f&f&t \end{array}$$
i just dont really understand it

Question

I can remember this table 
$$\begin{array}{ccc}\ \psi&\phi&\psi\Rightarrow\phi\ \text{____}&\text{____}&\text{____}\t&t&t\ t&f&f\ f&t&t\f&f&t \end{array}$$
i just dont really understand it

unklerhaukus · Answer

t for true 
f for false

anonymous · Answer

The real strange and hard to understand thing is the last line
f,  f,  t

unklerhaukus · Answer

i can not get my head around a possible venn diagram

anonymous · Answer

No venn will help you here these are predicate calculus - Venn is just set theory!

anonymous · Answer

He @UnkleRhaukus what's bugging you here ?

unklerhaukus · Answer

what does it all mean

unklerhaukus · Answer

example ?

unklerhaukus · Answer

i think i understand the first two rows

unklerhaukus · Answer

but say

$$\psi :  1=2$$$$\phi:   3=3$$

how does 
$$\psi\Rightarrow \phi$$?

anonymous · Answer

don't hurry: First of all it is all Boolean values i.e. 1,0  or T,F

unklerhaukus · Answer

right

unklerhaukus · Answer

$$0\Rightarrow 1$$ is true ?

anonymous · Answer

Well I don't like this either, but Yes -

anonymous · Answer

from False premise ANY conclusion is True !!

unklerhaukus · Answer

that kinda makes sense , 
 is    0   =   1/∞

anonymous · Answer

The bottom scribble on the R.H.S is meaningless

unklerhaukus · Answer

the probability is so slim

anonymous · Answer

??

unklerhaukus · Answer

if there are infinite possibilities, and all but one have zero probability  ( in logic)