Thus scientists infer that the age of these layers is following a similar pattern, with the higher layers being younger than the lower layers.

From other data scientists inferred that Mars has a core with a radius between 800 and 1,200 miles and almost certainly a metallic composition.

Palynology also allows scientists to infer the climatic conditions from the vegetation present in an area thousands or millions of years ago.

Based on growth rings in their ear bones (otoliths), scientists infer that individual coelacanths may live as long as 80 to 100 years.

Using the syllogism, scientists could infer new universal truths from those already established.

Statistical models also allow scientists to infer or predict how the brain might react based on previous data sets.

Mr. Alvarez and many (but by no means all) other scientists have inferred that the impact was the cause of the extinction.

This causes scientists to infer a system of trade with other local cities that have produced evidence for these resources.

The scientist, when once convinced of the fact of vitality and consciousness, would infer from these the previous process of generation.

Thus, scientists can infer that PGO waves exist in humans.