The phrase "are easily categorised" is correct and usable in written English.
It can be used when discussing items, concepts, or data that can be sorted or classified without difficulty.
Example: "The various types of fruits are easily categorised into categories such as citrus, berries, and stone fruits."
Alternatives: "can be easily classified" or "are simply grouped".
None of the four can be easily categorised or pigeonholed, nor are they easily described.
The junior set likes its food to be easily categorised, and the turducken will simply confuse them.
MDCT can generate a wide spectrum of findings in renal trauma and the majority of these can be easily categorised into the above-mentioned five AAST grades; moreover, MDCT may also show some findings that are not mentioned in the AAST classification, the latter being based on the kidney appearance at surgery.
Science backs this idea that we already intrinsically know to be true, recognising that while people may be capable of producing tears for a wide variety of reasons, all of our waterworks can be easily categorised into three distinct groups: basal, reflex, and emotional tears.
Difficulties concerning relationships are high on the patient agenda, as was shown in the reported frequencies, but they are complex, vary enormously and cannot be easily categorised.
Each component was easily categorised, with four representing the original themes ('the vulnerability of the back', 'the relationship between back pain and injury'activityity participation while experiencing back pain' and 'the prognosis of back pain'); an additional component ('psychological influences on recovery') had also emerged.
As in life, in Survivor people are not easily categorised, stereotypes are not a measure of success and winners cannot be easily predicted.
The identification of viral NA in samples sent for bacterial culture is interesting and probably reflects that clinical symptoms are not easily categorised as due to bacterial or viral infection in the CNS.
The audience for James Baldwin that evening could not be so easily categorised: it was, I suppose, half black, half white; half young, half old; three-quarters straight, a quarter gay.
