UCAT Syllogism Foundations
Learn the core premise and conclusion patterns used in UCAT syllogisms.
Written and reviewed by Dr Akash Gandhi, NHS GP (GMC 7601216) and founder of TheUKCATPeople, teaching the UCAT since 2012. Last reviewed .
Frequently asked questions
What is the UCAT Syllogism Foundations trainer?
Syllogism Foundations is a free starter trainer for UCAT Decision Making syllogisms. Each item gives one or two short premises and one conclusion, built to test a single rule, such as whether some can mean all or whether only can be reversed. You answer Yes or No, then see an explanation and a one-line key takeaway naming the rule, so you learn the logic before timed, full-length questions.
How does the Syllogism Foundations drill work?
Questions load twelve at a time and keep coming until you choose Finish drill or run out of new items, so you can practise for as long as you like. Questions you have not seen before are served first, and the trainer remembers what you have answered on that browser. Use the left and right arrow keys for Yes and No and Space to move on. Wrong answers come back for review a day later.
Does some mean some but not all in UCAT syllogisms?
No. In UCAT syllogisms some means at least one, and possibly all. So some A are B does not prove that some A are not B, and it leaves open the chance that every A is a B. Some A are not B cannot be reversed either: it tells you nothing about whether some B are not A. This is one of the most frequent errors, and several foundations items target it directly.
What does only mean in a UCAT syllogism?
Only reverses the direction of the statement. Only A are B means every B is an A, not that every A is a B. So only season ticket holders are lounge guests means every lounge guest holds a season ticket, while some ticket holders may never use the lounge. None but works the same way: none but licensed guides are cave leaders means every cave leader is a licensed guide.
What can I conclude from two premises in a UCAT syllogism?
Some pairs chain and some do not. All A are B plus all B are C gives all A are C. All A are B plus no B are C gives no A are C. Some A are B plus no B are C gives some A are not C. But two no statements never chain, and most A are B plus most B are C proves nothing. If most A are B and most A are C, though, at least one A is both.
When should I move on from Syllogism Foundations?
Move on once you can name the rule behind each item before you read the key takeaway, and your accuracy holds across several drills. Then use Syllogism Micro to make the same calls quickly against a timer, and Syllogism Macro for the full UCAT format of one stimulus with five Yes or No conclusions. If one pattern keeps catching you later, return here to that rule.