91影视

Deductive reasoning is conclusions based on accepted statements like a theorem, postulate, facts etc.

Now Valerie is older than Greg and Dan is older than Greg.

Case 1:

Let Valerie鈥檚 age be 10 years, Greg鈥檚 age be 8 years and Dan鈥檚 age be 9 years.

In this case it can be observed that Valerie is older than Greg and Dan is older than Greg such that Valerie is older than Dan.

Case 2:

Let Valerie鈥檚 age be 9 years, Greg鈥檚 age be 8 years and Dan鈥檚 age be 10 years.

In this case it can be observed that Valerie is older than Greg and Dan is older than Greg but Dan is older than Valerie.

From case 1 and case 2, it can be observed that either Valerie is older than Dan or Dan is older than Valerie.

Thus, no conclusion can be drawn.

Therefore, from statements 鈥淰alerie is older than Greg鈥� and 鈥淒an is older than Greg鈥� no conclusion can be reached.